How to Cut a Hydrothermal Emerald - Faceting Apprentice Sampler Course

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This is a sampler class on faceting hydrothermal emeralds. If you've been wanting to learn to cut gemstones but don't have the time or energy to travel across the world to take a class then this program might be right for you! Take a full apprenticeship course from your own studio and in your own time schedule. More info at: www.facetingapprentice.com
You can download the diagram for this design here:
drive.google.com/file/d/1Anxb...
I want to thank RusGems for donating a piece of their Hydrothermal "Colombian" colored Emerald for this video. You can find more about them and all the gem materials they make at : rusgems.com
If you'd like to learn more about how hydrothermal emeralds are made, you can find a video here: • How Hydrothermal Emera...
Find out about the book The Secret Teachings of Gemcutting here: www.magusgems.com/product-pag...
You can find information about our Sintered Cutting Laps here: www.magusgems.com/product-pag...
#FacetingApprentice #Distance #Course
00:00:00 Introduction
00:05:32 Preforming
00:13:10 Dopping
00:19:17 Girdling
00:32:46 Cutting the Crown
00:51:12 Polishing the Crown
01:07:54 Transferring the Stone
01:12:09 Cutting the Pavilion
01:24:28 Polishing the Pavilion
01:28:25 Undopping and Cleaning

Опубликовано:

10 июн 2024

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Комментарии : 138

@markoesombo8440 5 месяцев назад

God bless you, the way you need everyone to learn how you can cut and polish gemstone.

@JewelerAR 2 года назад

Full tips and resolutions to understand the machine and the faceting of a emerald... You are a great person

@rezinkie 2 года назад

I really appreciate this video Justin, I just started cutting stones at my local lapidary club and this video helped me figure out where I was going wrong. I was assuming my angle-stop would perfectly balance my facets but I see now this is where personal skill comes in vs mechanical aid. Thanks again.

@JustinKPrim 2 года назад

Glad to hear that figured out a very important realization. Good luck with the cutting

@sinceresincere-th4dt 2 месяца назад

My friend thanks for your perfect way of teaching, and working on gem stones.

@canadiangemstones7636 2 года назад

Excellent presentation and filming. Cutting the table first, and not using a transfer jig were alarming, but one cannot argue with the result. Extremely efficient work, on an accurate machine, an absolute pleasure to watch. Thanks for sharing this, it’s quite inspiring!

@rajeshkulkarni8402 6 месяцев назад

You are an excellent teacher Justin ❤.

@salalaos Год назад

I love the quality of your video with the HD and yet with the PIP at the corner of the screen while you are talking and working at the same time as good as for the interaction. LOL! You have quiet lot of knowledge and very skillful.

@JustinKPrim Год назад

Thank you. It took about a month to get it all set up with lighting and setup and all the furniture and props and getting all the cameras working together. But after it was all finished, I think it looked great. Thanks for noticing.

@salalaos Год назад

Hardworking always paid off successfully!

@michaelnorman5028 Год назад

In the early stages of balancing a crown i feel like a pair of calipers would exponentially speed the process up. After ten years of custom fabricating to tolerances of +/- .05⁰ the appreciation for your eyeball calipers is immense, not many people think about the skill involved behind the stone, let alone the time it takes to get there. I greatly appreciate this video, all of the information i was looking for in one spot to set me on my path of cutting!

@JustinKPrim Год назад

Thank you! Good lock on your endeavors.

@franslubbe4937 25 дней назад

Exellent work thankyou for sharing i am learning

@solidtank7957 2 года назад

This is excellent. This sample is much appreciated. I learned how to cut completely on the internet from the G.O. forums and the USFG email list from people who were gracious enough to share their knowledge such as yourself. I really can't express how much I appreciate your work. Have a lot going on right now health wise but I hope to be back to cutting again in 2022. In the meantime it really brightens some dark days when I see you have posted content, thank you.

@Algoldprospecting Год назад

Awesome.

@DamiensFandMadventures Год назад

Amazing to watch my first ever faceting process thanks for this upload mate

@JustinKPrim Год назад

my pleasure

@TheTahoe1982 Год назад

I don’t know anything about the gemstones but I really enjoyed the video. Thank you

@joshh2317 Год назад

Man I can’t believe you did the transfer without a jig that scares the fuck out of me hahaha good work man! And also it’s just interesting/funny how every artist has their own way of doing. Like how you use the double polish laps, I would NEVER but for you they work amazing! I’m a Batt lap kinda guy and Batt5! Straight up the best/most accurate/fastest polishing disks I’ve ever used.

@JustinKPrim Год назад

Yeah everyone has their own way. I’ve tried a lot of different techniques and ended up with something that works well for me and is easy to teach.

@Aboutknowledge01 2 года назад

Superb working, very informative and helpful for lapidary students like me. Thank you sir. ❤️❤️

@jtcustomknives 6 месяцев назад

That’s because 42 is the answer to life, universe and everything.

@konara261 4 месяца назад

Thank You Very Much ❤ 🇱🇰

@joseywilds3133 2 года назад

Excellent video, I’m excited to cut my stones, I have a little more confidence now

@josephgehring6106 Год назад

Much Love for this video. ❤ I will definitely check out the full course load!

@JustinKPrim Год назад

Thanks

@falconfalcon5757 2 года назад

very good, thank you Justin

@georgeser3939 2 года назад

Excellent! Couldn't be better 👏👏👏

@dioncarter1039 7 месяцев назад

Thanks so much man, this was a major help.

@sleepersix 2 года назад

awesome tutorial man

@lougutmann7702 3 месяца назад

really well done, one day ill do the class

@scandr060 7 месяцев назад

Great video, learned a lot!

@daykangemcutting8679 2 года назад

beautiful job and awesome video,ive watched all the videos about cutting gems and this video is the best one,im a cabashun cutter but now ive started to cut faceted gems and im using a method from one of your videos about old british gem cutting ways because i cant buy a mechine like yours,thank you so much.🌹🌹🌹🌹

@JustinKPrim 2 года назад

Enjoy. This one gives you an idea about the quality of the rest of the videos on facetingapprentice.com

@daykangemcutting8679 2 года назад

@@JustinKPrim thank you so much,ill check it.

@bigDrewhustles Год назад

I love your videos you are very knowledgeable and I am learning a lot from you thank you for sharing with us.

@user-zh4ue3fs9t Год назад

Great job Brother 👍

@goldcambodia 4 месяца назад

Good brother!

@fratgultek7343 10 месяцев назад

Thank you so much much much much much much much...........................................................

@lapidacaoinvencoeseartes 2 года назад

Parabéns seu trabalho ficou excelente a pedra bem polida Um forte abraço amigo 👍

@ydduar5932 11 месяцев назад

Great work .

@JustinKPrim 11 месяцев назад

Thanks

@ayeayeruby500 Год назад

Excellent 👍

@AJShiningThreads 11 месяцев назад

Fantastic 🎉

@isuruumendra307 Год назад

Thanks 👍

@TheFretman2 4 месяца назад

Good diagram for newbies...minimal meet points.

@JustinKPrim 4 месяца назад

My thinking exactly!!

@bandilla7317 2 года назад

nice sir Thnks the information.

@minhkimthanh3638 9 месяцев назад

Thanks

@izuzan7419 Год назад

coming from being a machinist... the vibration you are getting during polishing would drive me nuts.

@jtcustomknives 6 месяцев назад

I’m a machinist as well and building my own machine. I can’t stand vibration and anything out of balance or slop in the movement. But yeah that chatter when polishing was like nails on a chalkboard to any machinist.

@salehmoghadam3970 2 года назад

Thanks 👍👏👏👏👏👏

@jorgericardosucno2754 Год назад

GRACIAS JUSTIN

@JustinKPrim Год назад

De nada

@sulaimanachir5500 Год назад

very useful learning for beginners, I hope this knowledge can be useful, I am very motivated to start this new job immediately but my equipment is not as complete as in the video, I will try to find information

@Algoldprospecting 7 месяцев назад

Cool video. My Faceting machine will be here Thursday maybe try that cut first. Do you keep the girdle round and polish them?

@JustinKPrim 7 месяцев назад

Yes, keep the girdle smooth, polish it smooth . Good luck with your new machine.

@sumithsumithhewage3660 Год назад

Thanks sir Im From srilank

@tashacherry1480 3 месяца назад

So I'm guessing the feet are a rubber like material allowing for a bit of give or pressure. 47:53

@JustinKPrim 3 месяца назад

No it's a hard plastic. No give, we want firm contact with the glass. If we need to push in more we can lower the plate a bit.

@2ndPortal Год назад

Everything is so precise, and then... that transfer☠ just eyeballed😅

@JustinKPrim Год назад

No rules life 🤣😂

@elhanmardanov448 10 месяцев назад

Bravo supar

@devonrobillard3522 5 месяцев назад

I’m having trouble sourcing a dop holder/handle that you use for handling the dop during the dopping and transfer process. Closest I’m coming to is a pin vise but cannot find chucks that fit 1/4”. Do you have any source recommendations? Thanks for sharing all of this knowledge.

@JustinKPrim 5 месяцев назад

The one that I have is from Sterling. Maybe you can email them and order just that handle. www.sterlinggemland.com

@tashacherry1480 3 месяца назад

I am considering taking some classes so Im curious and honestly a bit confused. It would seem to me that the cuts would be precise given the device's purpose. Is it because of this particular lap machine you're using that the depths aren't automatically exact? Are there more precise machines? Or does this stem from the dopping? I wouldn't think pressure would be a factor bc you're setting the height of the glass plate. So I would think it's the machine as I have seen several makes/models. Edit, other than this question you're doing a great job in teaching me so I thank you very much 😊

@tashacherry1480 3 месяца назад

47:52 you answered my question. I spoke to soon lol.

@benjamindejonge3624 2 месяца назад

Looks like the perfect hobby for me, thus that machine takes more energy bills than my airco?

@JustinKPrim 2 месяца назад

I don’t think so. Aircon takes a lot. This is just a small motor.

@isurumaddumage1922 Год назад

I don't have much knowledge about gem cutting. But i want to know doing pavilion side first is advantages or disadvantages. Thank you.

@JustinKPrim Год назад

Both sides have their own advantages. This question is too long to answer here but is a good idea for a video topic.

@Vlr870 4 месяца назад

What device did you use to cut this stone? thank you for the information.

@JustinKPrim 4 месяца назад

A Sterling ST-08 faceting machine from www.sterlinggemland.com

@samonsabra524 2 года назад

I have a lot of stones and I have an account on RU-vid under the name of Samon sabra...I have also checked it in the lab but the results are not clear, regarding the type of stone, the hardness of the stone, the elements contained in it, the name of the stone, and the price of the stone bar.. can you help me sir???

@Mass-jab-death-2025 Год назад

Do you polish your head on those machines ? That is a mighty fine shine you have got on that dome.

@JustinKPrim Год назад

🤣😆🤣

@landontakeamericaback2106 Год назад

So I take it your left handed? Am thinking about ordering the sterling machine I believe its listed as right keft hand .

@JustinKPrim Год назад

The Handpiece goes in your right hand and your left hand controls the riser knob. It doesn’t matter if you’re left or right handed, it works the same. You can really put the Handpiece in your left hand because you couldn’t squeeze the index trigger and I think it would be uncomfortable.

@prettykurianphilip6889 2 года назад

I want your book. What should I do ?

@lrmodranoel Год назад

Nice video. Why not using a transfer jig?

@JustinKPrim Год назад

It’s faster and easier not to. Plus then you don’t need to buy a transfer jig.

@alexseguinp 6 месяцев назад

Hey Justin. I’m really thinking about getting into the hobby. I’m working in manufacturing and I’ve been a draftsman for 8 years. I think I can understand a good part of the geometry and process. Just a quick question: Since I want this to fit with another of my hobbies, how hard is it to craft a icosahedron? This would be my main goal on the long run.

@JustinKPrim 6 месяцев назад

It’s not hard but first you need to understand how the machine works and then understand how to get a good polish. Those two things can take months but go ahead and give it a try and see if you enjoy the challenge.

@DonnaChassie 11 месяцев назад

Could You have used a transfer jig, to change the gem from one dop to the other?

@JustinKPrim 11 месяцев назад

I could have.

@mohamedhwusymm863 Год назад

❤️❤️

@elhanmardanov448 10 месяцев назад

Wo kaufen die Maschine

@user-tx6ue4ho5z Год назад

열수 에메랄드 경도 자연산에비해 강도는 어떤지요?

@landontakeamericaback2106 Год назад

Great video ?? If you initially cut the first 4 facets at same angle & depth why the difference causing you have to balance 1 or 2? Is it the manipulator?

@JustinKPrim Год назад

The machine isn’t perfect so we make up for it in our cutting skill.

@nicolapiubel 5 месяцев назад

@@JustinKPrim Does this also happen with the mast machine? Is this why sound signals (ultra tec) or comparators (facetron) are often used in mast machines? Or is this inevitable?

@JustinKPrim 5 месяцев назад

@@nicolapiubel it’s inevitable. You almost always have to manually balance the facets on any machine. An advanced cutter can usually get very close through timing, sounds, feeling but the visual inspection will always be the final determining factor and there’s usually small tweaks to be made at that point.

@_Smash_ 2 года назад

Where can I even find a machine like that? I have scoured websites and have not seen that machine before.

@JustinKPrim 2 года назад

Www.sterlinggemland.com

@hijazahamed9298 Год назад

❤️❤️❤️❤️❤️

@williambarnes5023 Год назад

What's the reasoning behind cutting the table at index 96? If the angle is zero, then shouldn't it not matter what the index is?

@JustinKPrim Год назад

If we always cut the table on 96, then we will never forget which number we cut it on. However you can make it whatever number you like, just make sure that you always polish on the same index number you cut on. 96 just helps you remember.

@williambarnes5023 Год назад

@@JustinKPrim Thanks for the response. I'm sure I'm still missing something. Why is it important to polish the table on the same index you cut? Isn't zero still zero no matter which way you index it?

@JustinKPrim Год назад

@@williambarnes5023 No. If you polish on different number you will see the the table doesn't come in flat. On the mast machine, we don't get to see this problem because usually the table adapter is keyed to 96 so there isn't another choice.

@williambarnes5023 Год назад

@@JustinKPrim Good to know. Thank you!

@Alexander_Sannikov Год назад

why when you cut facets by rotating the gem, facets somehow end up slightly different sized and why do you need to balance them? for a layman it's not obvious why they don't end up perfectly equal.

@JustinKPrim Год назад

The cutter has to manually make them all the same size by looking a lot and adjusting each facet to be perfect.

@user-qn6ty1oc2z Месяц назад

How do you prep a new tin lap to be dual band lap?

@JustinKPrim Месяц назад

This is a great idea for a video but in short, I like to take a marker and put it in the middle of the lap and turn the machine on for a second. This gives you a perfect circle. On the outside band apply 8k diamond slurry. On the inner band, Apply 60k slurry. Polish a stone. Dont crosscontaminate.

@MikeG-js1jt 10 месяцев назад

it didnt look like you were using any water on the polish...how come?

@JustinKPrim 10 месяцев назад

If you use oil and diamond powder slurry, you don’t need water. The oil is the lubricant and the coolant.

@imetr8r 11 месяцев назад

Can link me to a cut sheet pdf for cutting a simple 8-fold mirror for cubic zirconia? I such a novice that I can't even figure out how to Google the proper words to find the appropriate cut sheet!

@JustinKPrim 11 месяцев назад

The link is in the description of the video. You can easily use those angles for cz. Good luck.

@imetr8r 11 месяцев назад

@@JustinKPrim For CZ (with its higher R.I.) I'm guessing the pavilion P1 angle should be 45 instead of 42 degrees, but I've no idea what the crown C1 angle should be, although I assume 35 degrees would be OK?

@JustinKPrim 11 месяцев назад

@@imetr8r You can changed it to 45 or just leave it at 42. I wouldn't change the crown angle.

@mehdiheidari1440 Месяц назад

@rufaelsolomon6184 2 года назад

👍👍👍👍👍👍👍👍👍👍👍👍👍

@Indrid__Cold Год назад

I'm surprised that preforming is so much of a hand-held process. Why would you not dop the stone and maintain the control that a facet assembly would give you?

@nebilllnebiill2433 Год назад

Where can I find this machine

@JustinKPrim Год назад

Www.sterlinggemland.com

@deivydaskersulis4834 9 месяцев назад

1:27:58 I see issue right?

@hannaverra1749 2 года назад

hi I'm very happy with your video, I'm from Papua Indonesia, although I don't understand English, but I can understand what you mean, I want to ask if I can get your address so I can send my gemstones and you cut it at your place ? my type of gemstone is on my RU-vid.thanks

@JustinKPrim 2 года назад

Hello. Yes you can send an email to Justinkprim at gmail

@burhani_Engineering_Technology 2 года назад

Watsapp number

@landontakeamericaback2106 Год назад

Hmm why no transfer block?

@JustinKPrim Год назад

No need

@theinpikesoe-it4xi Год назад

plz brother oval cutting

@JustinKPrim Год назад

That one is on the website. Facetingapprentice.com

@pumpkindiamond994 2 года назад

The cutting style made it look so fake like glass

@JustinKPrim 2 года назад

The design is to make an easy cutting experience, not for the look of the stone. This design is normally used in tiny melee stones where you can’t see the pattern because it’s so small.

@solarcutgems 2 месяца назад

In other words how to cut a synthetic emerald

@JustinKPrim 2 месяца назад

I think those are the exact same words. :) I have a class on the website all about natural emeralds if you're interested : www.facetingapprentice.com/courses/emeralds-and-the-emerald-cut

@davidhastings7714 2 года назад

the buzzing from the machine is very annoying and ear piercing.

@JustinKPrim 2 года назад

Agreed.

@MikeG-js1jt 10 месяцев назад

So many issues of criticality pop up far more often on these machines as compared to a decent mast type

@nicolascrav4812 20 дней назад

You mean synthetic hydrothermal, natural emeralds can also be hydrothermal

@JustinKPrim 20 дней назад

I don’t know what you mean by that statement. Hydrothermal growth (solution process) requires heat and pressure and imitates the conditions deep in the earth that result in the formation of natural gems. Nutrients are dissolved in a water solution, and then synthetic crystals form as the solution cools. It’s one of the ways that synthetic stones are made. I’ve never heard anyone refer to a natural emerald as a hydrothermal emerald. Those are just “emeralds.” Have you?

@nicolascrav4812 20 дней назад

@@JustinKPrim If you base your knowledge on what you "hear people say", that leads to the error of ignorant people. I repeat, natural emeralds can also be hydrothermal, therefore the correct thing would be to say synthetic, or if you want to clarify the synthesis method it would be hydrothermal synthetic.