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Square Shape 12x12 mm Gems Single |
Square Shape 12x12 mm Gems Pairs |
Square Shape 12x12 mm Gems Lots |
Square Shape 12x12 mm Gems Faceted |
Square Shape 12x12 mm Gems Cabochons |
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 Square shapes, facet cut and cabochon gems available now in 12 mm x 12 mm size range. Shop a wide range of calibrated gemstones by size online at wholesale from GemSelect.
As a general guideline, when it comes to 'calibrated' gems, they are not meant nor expected to be cut to exact measurements. 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 around 0.3 mm or slightly higher even. This small variance can usually be accommodated for 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.
Over 19 Years in the Gemstone Business!
Thank you for trusting us with your purchase!
Overall Rating -> 10 
Fine. All emails answered. Excellent service. Nice discount added for orders. Briefly, a very good experience.
Overall Rating -> 9 
The selection and filtering is a little overwhelming, but that's only because there is so much to choose from.
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 -> 7 
I placed order#384714 based on the picture on your website and the stone came in much darker. I'm sure it's the same stone i ordered but your lighting made it seem a lighter blue. I was trying to match a stone for a customer and based on the picture it would have been close enough but the stone in person is a mile off.
Overall Rating -> 9
Never bought anything on this website before, but it probably won't be my last purchase. Definitely one of the easiest to use and most informative sites I've ever been to.
Overall Rating -> 10
I love the clear description of the certification options. It's very rare to see a gem site that offers a deep explanation of each institution that would certify the stone(s).
Overall Rating -> 10
Wonderful selection of gems to choose from. Have made many purchases and was only slightly disappointed once.
Overall Rating -> 10
Great website and information
Overall Rating -> 10
Fantastic dealer for quality gemstones. Website is easy to navigate, selection is superb, delivery of purchases is prompt. Easy to select incorrect payment options, however.
Overall Rating -> 10
this was very easy im exited to get my order
Overall Rating -> 10
Selection ability was straightforward and easy.
Overall Rating -> 8 
I did not realize how small the stone was. I cannot use it for the project I wanted, but I am keeping the stone and tru to use it in something else.
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