Gem Cutting Tutorial - Reading a Gem Faceting Diagram

Gem Cutting Tutorial - Reading a Gem Faceting Diagram - Part 2

Рет қаралды 22,275

Күн бұрын

Welcome to the 2nd part of Michael's 2-part tutorial on gem faceting diagrams! In this video, Mike will explain some of the things necessary for a gem cutter to understand when using a faceting diagram -- where to find faceting designs, what kind of gear index to use for a certain stone cut, symmetry and when it's used, and the girdle of a stone.
If you are new to the gem cutting hobby or if you aspire someday to provide professional gem cutting services, or if you were simply out hiking recently and stumbled across a pretty colored gemstone and were thinking about all the possible gem cutting shapes you could make with Dremel, then this video may help give you some pointers.
As always, if your travels take you near me or our store, please drop in, we would love to talk to you about this unique trade. If you are interested in learning new gem cutting machine prices or you want to know which cutters currently have used gem cutting and polishing machines for sale, just ask as I am always happy to answer any questions you may have.
If you are thinking about attending a gem cutting school to take more formal gem cutting lessons or even complete Gem Cutting 101 courses, I would recommend you first search for a Gem Cutting Club or Lapidary Club near you as they will have the best information on what is available in your area.
We're always open to hearing from you about ways we can improve our tutorials! Please let us know in the comments how we can help you be on your way to mastering the art of gem cutting.
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Пікірлер: 59

@fionalyall7248 Ай бұрын

Very easy to understand tutorial, thank you. The diagrams really helped me understand all the terminology

@Stoked778 3 жыл бұрын

I’m just getting started learning about faceting gemstones and appreciate your videos. I like your video style and good narration. Thanks for putting these together. Super good info about the online archives!

@BOPIESDiamondsFineJewelry 3 жыл бұрын

You are welcome!

@jacobleedowney 4 жыл бұрын

I love the animation during the intro!

@BOPIESDiamondsFineJewelry 4 жыл бұрын

Thank you Jacob! I grew up in an era where a cartoon always preceded the feature. The intro will evolve…stay tuned for a mystery that will hopefully keep everyone amused. 😊

@tonyemmett9296 3 жыл бұрын

Brilliant fundamentals explanation for a beginner like me. Thanks!

@mikesackos2208 3 жыл бұрын

You are welcome.

@dhernandez1864 Жыл бұрын

Thank you for all the great information in your videos. I am just getting started and this is the exact kind of tutorials I need to keep me moving forward.

@mikesackos2208 Жыл бұрын

You are very welcome. Best of luck to you!

@samluck5185 Жыл бұрын

Thank you for sharing the knowledge, very informative 👍

@mikesackos2208 11 ай бұрын

You are welcome.

@daisensei69 5 ай бұрын

Love your videos as I find them very interesting and informative 😎👍 As a side note, you mention the girdle when polishing to use less than 90 degrees, but the insert text says “>90” which is actually larger than 90. It should be “

@BOPIESDiamondsFineJewelry 5 ай бұрын

hmm...OK. So I think of a box....the side of the box is a 90 degree angle, that is where the girdle is normally faceted. The bottom (and top) of the box is 180 degrees and that is where the table is cut (for the top). So if you have a lot of material at 90 degrees (because you have only cut the pavilion at this point) you want to trim back a lot of that excess rough from the girdle to the table as it will get cut off when you cut the crown (upper half)...so you want to cut a little over 90 degrees to get this material out of the way and leave just a small amount (less than 1 mm) for the girdle...which will end up being something like .2 to .5 mm (depending on your preference). So in the prepolish you can cut back at greater than 90 degrees and get all that excess out of the way (that cuts from the bottom of the stone toward the pavilion) and then polish the now small girdle at 90 degrees...or you could polish at slightly more than 90 degrees in which case this goes from the pavilion toward the crown side. So...it's confusing but..greater than 90 degrees...watch your facet and walk it toward the pavilion and leave about 1mm to polish your girdle, or less than 90 degrees and walk it just to about 1mm and cut the rest off when you work the crown. I know it's confusing, but if you cut slowly you can see how your cutting is moving toward the pavilion or away from the pavilion...the goal is just to have to polish a small amount (less than 1mm) at this point in your cutting. Hope this helps.

@daisensei69 5 ай бұрын

@@BOPIESDiamondsFineJewelry I wasn’t asking why, merely saying the symbol in your text was wrong

@LarryShute 4 жыл бұрын

Another great video. Lots of useful information. Thanks.

@BOPIESDiamondsFineJewelry 4 жыл бұрын

Thanks again for the feedback Larry, I really appreciate it.

@CoraleenWaddell 3 жыл бұрын

Wonderful video! Thank you!

@mikesackos2208 2 жыл бұрын

Thank you!

@charithkulatunga1505 4 жыл бұрын

Very useful piece of information Mike. It is a helpful hand for newbie like us. Thank you for sharing your knowledge. ❤❤

@BOPIESDiamondsFineJewelry 4 жыл бұрын

You are very welcome!

@alphatango1358 2 жыл бұрын

Greetings from New York.. 👌👌👌🇺🇲🗽🇵🇱

@mikesackos2208 2 жыл бұрын

Hello New York!

@user-hl9ql6nk5i 9 ай бұрын

Gracias por su información bastante interesante.. me gustaría emprender este interesante y hermoso oficio.. tengo algunos topacios grandes y pequeños y docenas de kilos de cuarzos de buen tamaño y con calidad de gemas.. y también tengo algunas otras piedras Preciosas que desconozco su nombre.. en fin.. muchas gracias por su tutorial muy completo..

@mikesackos2208 9 ай бұрын

I wish you the best of luck with gem cutting! You seem to have a nice selection of gem material to facet.

@salimsopari 3 жыл бұрын

Thanks for making this video

@mikesackos2208 3 жыл бұрын

You are welcome.

@timmsmiithgm557 3 жыл бұрын

Still waiting for the machine to arrive so haven't even cut one yet, but can't imagine ever not wanting to polish the girdle - it just seems like it would be unfinished otherwise.

@mikesackos2208 2 жыл бұрын

That is what I think also....but there are gem cutters...very very good cutters who do not polish the girdle.

@hashamabrar975 4 жыл бұрын

very useful video love it

@BOPIESDiamondsFineJewelry 4 жыл бұрын

Thank yoU!

@waynejarrett4808 Жыл бұрын

I enjoy watching your videos. Cutting gems is something that I want to get into. Maybe I have not seen it, but do you have a video from start to finish? How to clean a rough gem (dug up) to finish. Do you have any recommendations for a machine that is not in the 1k price range?

@mikesackos2208 Жыл бұрын

Thanks! I think you would enjoy gem cutting! No, I don't have any videos on cleaning a dug up gem from the ground, but I do have videos on preforming rough gems. As far as recommendations on gem cutting machines, I have only used an Ultra Tec, now a V5. I don't know of any great machines in the $1K range. A good new machine, with all the accessories, is closer to the $5K range.

@spiritualityinGod 4 жыл бұрын

Thanks.

@BOPIESDiamondsFineJewelry 4 жыл бұрын

You are welcome.

@cristosmagillio1950 Жыл бұрын

What is a good gem faceting machine to start with? Nothing fancy, just needs to actually work?

@mikesackos2208 Жыл бұрын

I have only ever used an Ultra Tec machine, the V2 and now the V5. There is a facebook page dedicated to used Faceting equipment, which you may find useful.

@cristosmagillio1950 Жыл бұрын

@@mikesackos2208 whats the group name

@DeepNorthAdventures 11 ай бұрын

I am still very new to faceting and I may have missed it somewhere along the way of both tutorial videos but i am curious if there is anything in the diagrams stating how high to have your protractor on the vertical (Y axis) to do each angle properly?

@mikesackos2208 9 ай бұрын

That is one part of Gem Cutting which you have to learn by experience. After setting the correct angle and the correct index tooth, both of which come from the instructions, you lower the stone onto the lap until it touches the lap...how much depends on experience. The more you lower the stone onto the lap, the more material you will remove.

4 жыл бұрын

Top

@BOPIESDiamondsFineJewelry 4 жыл бұрын

Thank you!

@percythorpe1076 3 жыл бұрын

Ringcutters

@BOPIESDiamondsFineJewelry 3 жыл бұрын

THanks.

@Schtroumpsolis 2 жыл бұрын

info are great, its funny that you make a point to say you polish it ,and give a whole bunch of reason to not polish it :-). on diagram do you pic diagram r.i. that match the stone r.i you cut?

@mikesackos2208 Жыл бұрын

Thanks. I try to give both sides to the argument regarding polishing or not polishing the girdle. Regarding the R.I., I normally load the diagram into Gem Cut Studio software and check the performance with the R.I. of the stone I want to cut, then I see if I can make any minor adjustments to the design to improve performance.

@vonbassett142 2 жыл бұрын

Thanks for the info. Question....... how do determine the order of cuts start to finish. Yoiu talked about going in a repIring a stone previously cut, but how do you determine what ° you need to do the repairs ?

@mikesackos2208 2 жыл бұрын

For repairs, your best bet is experience. If you have cut a number of say oval gems, and you are repairing an oval gem, you can pretty much figure out which facets need some work. You can 'line up' a facet by using a block of metal (precision cut) on top of your flattest lap, and adjust the quil of your machine, increasing or decreasing the degrees and letting the stone free wheel left or right...when the facet is flat on your metal block, you have it set up to cut that facet...make sense?

@vonbassett142 2 жыл бұрын

@@mikesackos2208 yes... I saw this very explanation in another video affer asking that... Thanks

@hashamabrar975 4 жыл бұрын

hi Boppies.. I have question , if L/W ratio of rough is good enough to cut so then H/W ratio matter to cut that gem or not.... i mean if H/W ration is not good enough to cut the gem but L/W Ratio is good enough of rough to cut the stone .. can we able to cut that stone according to gem diagram??

@BOPIESDiamondsFineJewelry 3 жыл бұрын

Depending on the type of design, if you get the L/W ratio wrong, it will cause problems with your facets. Especially for an oval or marquise. The H/W ratio helps you make sure you have enough rough to cut the final 1/2 of the stone, normally the crown.

@dr.farasatiqbal544 2 жыл бұрын

sir how to do manage the heights of the stone i.e. pavilion, girdle and crown? is there any easy way out ?

@mikesackos2208 2 жыл бұрын

The design tells you the C/W or P/W (crown to width or height; pavilion to width or depth)...to adjust, I use Gem Cut Studio...or look for a different design.

@wesleyc.4937 3 ай бұрын

SYMMETRY -- A repeated sequence of cuts.

@BOPIESDiamondsFineJewelry 3 ай бұрын

Yes, I believe that is a good definition.

@joshmacpherson6919 2 жыл бұрын

i like that subtle shout out to vintage time., any commentary on moriarty over at moregems.,?.,? i don't have anywhere close to an accurate enough machine to do mostly any of this., but ., i want to., i mine my own stones., now i want to cut my own., my phone must have geo located because after i stopped at this store hoping to maybe buy an old machine., now my home computer has piles of cutting vids from there., amazing.,., ';'

@mikesackos2208 2 жыл бұрын

Steve at moregems has some great videos! I also enjoy Cliff's videos...and Brent's at Gems by MBK...and the German Gem Cutter....and others :-)