Gem Cutting Tutorial: Lab Created Ruby
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- Опубліковано 20 лис 2021
- Mike has an old half boule of lab created ruby that he would like to finally cut. Watch as award-winning gem cutter, Michael Sackos, facets this ruby into the “Standard Oblong Step Cut With Cut Corners” design. In this video, he also experiments with using a 100 grit topper with corundum and demonstrates his method of seasoning his 100 grit batt lap.
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Thank you for the work you do. I just bought a ruby ring, and learning about the process helps me appreciate it more.
Yes, the more you learn about the processes, the more fun it is to own some gemstones.
Question: Have you ever seen Asin, aka a pearly stain, on a lab created Ruby? It's my understanding Asin is 1 of the inclusions that can't be recreated in a lab grown stone. Thanks for your time!
I am sorry, but I am not familiar with Asin. I'll see if I can find anything out from my fellow cutters.
Another great tutorial Mike
Thank you paul
I'll be giving the 100k polish a try soon, thank you for showing us how it can be done. I also appreciate the sequencing tip about cutting the corners last.
You are very welcome.
Any one else notice the young Frankenstein reference, beautifully executed lol
lol...I was wondering if anyone would notice the reference. Good job!
Love it
oh how nice it looks
Thank you!
Very nice result
Thank you!
Cool video, I have some Lindy star material like this.
Thanks. I haven't cut a Star Sapphire before...mostly because that's more in the line of those who have the talent to cab.
I saw in another video that you purchased a copper lap but I don't remember seeing you use it. You should give it a try with the Pandimonium polycrystalline stick. I have had good results with corundum on the exact copper lap you got with the PC Pandimonium sticks.
You are right, I have not yet used that copper lap...I will say it is a beautiful lap!!!! What is the finest grit of diamond you have used to polish corundum using your copper lap?
Because of the angle on the end I would do a heart shaped stone.💓💓💓
Are you sure that it is 'curved' enough to make a heart without loosing a lot of rough? I haven't cut a heart shaped stone in a while, I guess it's about time to cut some. Thanks for the suggestion.
Great Job, and nicely done.
But I have a question.: At 15:38 of your Video, while showing the Boule for comparism, I saw some Concordial fractures at the lower part of the boule in the frozen frame. Is this consistent with Sapphires/Rubies, or only found in the Lab created ones?
Lab created Corundum is a bit unique. The boule (a full round boule) is under pressure, so for Corundum, the boule must be split in half. That is why whenever you see lab created Corundum (ruby or sapphire) for sale, it is a 'split' boule. I am no expert, but I suspect that the fractures (or what you are calling concordial fractures) are created when the boule is split and are unique to Lab created corundum and not natural corundum or lab created material. Again, that's just my thinking...please let me know if I am wrong.
My design suggestion for the "blob" is "Radiation Hexagon" by Edith Strout. I recently cut the design out of synthetic blue quartz, I also used GCS to make sure it didn't window as the design is for a RI of 1.76. Worked nicely and produced a nice deep blue sparkle.
Thanks Brad. I looked up that design and the length/width fits nicely with my blob. That may very well be the design I use, thanks again!
Hi, im new to gemstone cutting and recently bought some synthetic corundum and ran into a problem polishing with a batt lap. With the zinc laps do you recommend using diamond powder or paste? Or does it not really matter?
I suggest heart cut. It is a pink sapphire great in heart shape
Just curious how large of a stone are you able to cut?
How do you cut by half the raw piece? What kind of machinery do you use for that purpose?
❤heart shape pink sapphire you must cut
I will put that on the list. Thanks.
Lindas pedras eu tenho uma safira assim
Thank you!!
What faceting machine do you use?
I use the Ultra Tec V5. However, I understand the Facetron and GemMaster II or III are also excellent machines. I just haven't used them.
African eye cut is super nice. I think im getting the name wrong but its a oval shaped eye like cut. very pretty
Thanks Jason. I will cut an 'eye' design eventually. There are many designs out there, if you have a favorite, just let me know.
can you tell me some shop that i can buy rough Synthetic Ruby it's really hard to find it in my country
If you pm me on facebook, I will be glad to assist you.
Beautiful stone Mike, thanks for sharing!
Did you happen to pick up any of the color change corundum Joe H had a few months ago?
For natural color change Sapphire (corundum), I picked up a piece a while back, but not from Joe. I made a video on cutting it. For lab created, no, I don't have any color change rough. I suspect color change lab created corundum is not hard to find. One word of caution on the 'blue' lab created corundum 1/2 boules, including most color change...the color is only in the 'rind'...so the trick is to orient the rough to get the color to flow through the stone. Although there is some disagreement between cutters (as with virtually all things related to gem cutting), my experience is to cut the stone so the color is in the culet...that will flood the stone with color. Again, there are other super talented cutters who disagree...so I will just say it's my experience and my opinion, and leave it at that.
@@mikesackos2208 I had no idea about that issue. Good to know, thank you!
Do you sell these stones too ? I am looking for a yellow sapphire 8-9 carat cushion cut . How would it be ?
My wife, Bopie, runs the jewelry store "Bopie's Diamonds and Fine Jewelry". She sells jewelry. I don't sell my stones...they all go to Bopie...for free 🙂 I have cut natural Yellow Sapphire, but I don't recall cutting anything that large in natural Sapphire, but you can contact my wife and discuss it.
Hi !
I want to buy one lab created ruby.
I would like to know how many cm you need to cut to have the right size.
Regards!
As a very general rule, a cutter can expect 20-25% return from a piece of rough...but it varies widely depending on the design and the shape of the rough.
How can you explain that we can get 15 carat lab ruby for under 10$ on Ebay (I've some under 1$ in auction)
It's not as perfectly cut as yours, but still great.
I've tested it: it glow under UV and is harder than quartz.
What is it you would like me to explain? I guess that I would say, first off, the flame fusion method of creating corundum (Ruby and Sapphire) is relatively inexpensive. The hydro-thermal method is relatively expensive. Secondly, I would say that there are people in the world cutting gemstones all day, every day, for very low wages. They use basic equipment and don't worry about perfect meet points or polish. In my opinion, you get what you pay for. Does that help?
Sorry to inform you - that $10 "stone" off eBay (ALL of which are from India, btw)... glass. Also, if craftsmanship doesn't matter to you, why did you even watch this video? As far as your ability to adequately perform gemological testing... I prefer to rely on winning the lotto.
@@timmsmiithgm557 I'm a mineralogist technician and an analytical chemistry technician as well.
I've exposed my cheap Ebay ruby to UV light and they emit red fluorescence. They have no problem to mark glass and quartz. So, I can confirm that theses are not glass, they are ruby 100% sure. I do have other Ebay sample that are glass, but all the red ones I've got are ruby.
I'm juste fascinated (not positive) how cheap it can be. How someone can send a faceted lab grown ruby for 1-10$ ???
It is so sad for the low paid workers, isn't?
I don't know if I'm part of the problem or not since I've bought it?
@@alexandrevaliquette1941 VERY likely the pieces going for $1 were stolen - since they have no skin in the game, they are only motivated by making a quick buck or two.
I much prefer flux grown Chatham rough. Their material has an actual crystal lattice that flame fusion just cannot match. Thats what happens when you grow actual crystals over a twelve month period vs. spinning up a popsicle of corundum melt in an hour. Of course, flux gems are VERY hard to come by. I'm friends with a member of the Chatham family, so I can get rough easily. They stopped offering rough to the public many years ago. I've argued with them, but they want to retain total control of anything called Chatham.
Hi. Do you do any special cutting with the chatham rough? I'm looking for a nice elongated oval ruby
@@TJ-kg5bv Hi there. I don't do any cutting of the rough inasmuch as the uncut crystals are absolutely spectacular, far, far more beautiful than even the best mined ruby crystals.
@@Indrid__Cold hi thank u for your response. I own a chatham sapphire 12 by 10. I agree its beautiful. I am just in the market for a more elongated silhouette for an oval than the shorter ratios that Chatham offers. But I want it to still be chatham ruby.
I don't have a preference between the types of lab created emerald. The hydrothermal costs more, but I can get thicker slabs than by buying a 1/2 boule.
How did you make such big one ?
I made a big gemstone by starting with a bigger piece of uncut gemstone rough. 🙂
make a dice out of it... 4 6 8 10 12 or 20 sided. do gold inlay for the pips.
Interesting. Thanks.
I am cutting synthetic ruby too.
What's your favorite design in Ruby?
I have raw ruby and want cutting. Can you help. I can send photos
What’s the price of this cut lab Ruby roughly any idea please?
Sorry, but I don't want to get into discussions on pricing, profit, loss, time spent cutting, cost of rough, etc. I am happy to provide videos showing you how to cut gemstones....for the rest, you will have to discuss with others.
Try to make some viral videos, more people needs meet this amazing content.
Thank you...I'll try.
I understand the best performance via luster that is also due to the cut of the stone as well I am only young at this all I ever cut glass and a few pieces of quartz no disrespect I also thought it had to do with the facet plan. Again no disrespect.
Hi Daniel. You are referencing 'performance via luster', in your comment in trying to define 'best performance'. There are countless ways to define performance, and I try to explain that in the video. When I was talking about performance here, for me cutting this specific gemstone, I was defining performance very specifically as "ISO brightness in the face up position". I fully understand many gem cutters will have a different view of 'best performance', and that is perfectly fine with me. So, for me, what I look for in a cut gemstone is the sparkle or brilliance as I look down at the stone in the face up position...and I use GCS to predict that performance. If you have another method, great!!! For performance, some cutters may strive for some minimal amount of windowing. Some other cutters may look at ISO brightness over an entire 30% tilt range through both the X and Y, they may have some formula for a weighted average that they think is optimal....GREAT! I am not saying any definition of 'best performance' is wrong. Again, in the video, I explain how I personally am defining 'best performance'. I am not saying you have to agree...in fact the world of cutting is much more fun when there are many opinions on a topic.
@@mikesackos2208 thank you for giving your opinion on this matter I just love faceting no one can beat it from lab created rough to natural gemstones rough and how expensive it can get and what risks your taking the thrills and spills of faceting thank you for your opinion hail to you fellow faceting human being.
I have photos and I can share them
Great. Thanks! Please do share.