Buy Marquise Shape 12x6 mm Gems(366) |
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Some people by gems by color or price, but for many, it is best to buy gems by shape and size - especially if you're in need of a gem to replace a previous item that was lost or damaged. Calibrated marquise shaped facet cut gems, gemstone carvings and cabochons available in 12 mm x 6 mm sizes. For the largest selection of colored gemstones, Shop GemSelect Online.
As a general guideline, when it comes to calibrated gems, they are not usually expected to be cut to exact measurements and specifications. But rather, they're cut with slight variance in size, though the close approximatation in size is not clearly defined, there are general guidelines for what is considered acceptable. Obviously larger and heavy carat weight stones allow more room in size for variance, while smaller stones may leave little to none. This means a large 30mm calibrated gemstone, could actually be closer to 31 millimeters. For this reason, we recommend to always view the exact size in addition to the calibrated size details. The exact size will inform you of the variance you can expect. Some setting styles are more flexible with variance, such as prong settings, while other styles of mountings may need almost an exact size to the fraction of millimeter.
For calibrated gemstones weighing under one carat, most jewelry settings will accommodate a gem which is within 0.2 mm of the calibrated size in order to fit a standard setting. For gemstones that weigh over one carat, a larger variance is acceptable, often round shape settings will allow 0.3 mm or slightly higher even. This small variance can usually be accommodated for most standard style settings. Round-cut gemstones should also have a greater variance in acceptable size when it comes to calibration; in fact it is usually possible to mount a round stone of any size in the closest standard setting.
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Overall Rating -> 8 
Everything was good about this order except I was a little disappointed in the product because it was so small. This is the first time that I have ever bought a gem so I was very unfamiliar with the sizes mainly because measurements were in metric.
Overall Rating -> 10 
I am excited for my first order, search tools were a great help to find the sapphire I needed for my next project! Thank you
Overall Rating -> 8
1st time buy. The experience to date has been easy.
Overall Rating -> 7 
I love this site, I learn a lot from it. I like the selection and quality, I can't wait to use them in my work. The specimens are phenomenal. Look forward to more business from me in the future..
Overall Rating -> 10
After working with and polishing low-grade, rough fire-agate, only to be disappointed, this shop was nirvana. The costs of some gems might seem high, but I have easily spent the same amount rough polishing lousy material only to get a few hints of fire. If you want Fire-agates, BUY the agates you want. These are excellent specimens and are worth considering.
Overall Rating -> 10
Great site easy to find what I'm looking for
Overall Rating -> 10
Excellent prices, excellent gemstones, easy to navigating, at the checkout, only a part of my cart was paid, then I get back to my chart, and the missing gemstones were there, so I pay it.At the end of the day, I did 2 consecutive purchases, paying 2 shippings. But even with that issue, I’m sure that worth it.Thanks!
Overall Rating -> 9 
Really good selection of low cost gems, which is what I care about.
Overall Rating -> 8
i was hoping to find more stones smaller than 3mm
Overall Rating -> 9
Everything was good but since I am still new I was surprised at how small the stones where.
Overall Rating -> 10
Very wide selection, plenty of accent stones to choose from. Both expensive and inexpensive gems have wide variety. Great website layout too.
Overall Rating -> 10
I am not well versed in using the internet but, I found the website friendly and easy to use.
Overall Rating -> 10
This site is *amazing*! The vast selection is almost enough to make you giggle. Oh, wait…If you want it, it’s probably here. I’ve read some reviews saying it’s hard to use the search filters but I found the opposite to be true. In fact, it’s plain fun to throw different filters on and see what you come up with. I ordered a small stone to sort of try them out and, dang! I’m so thoroughly impressed that I think I found a new hobby. The stone I got was exact what was represented on the site. So much so that I had to really look to see the difference between the picture and the stone that I got. And the range of prices. Wow! From a few dollars to tens of thousands if you’re into like, Ruby’s, Emerald’s, Sapphire’s and other gems that make you drool. And the cuts! The shapes and cuts are just plain gorgeous!Honestly, I can’t possibly say just how happy I am with this purchase! Now… off to make another…
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Size and Weight
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Gems are always measured in Millimeter (mm) Dimensions are given as; Select gems by size, not by weight! Note: 1ct = 0.2g  |
