Buy Marquise Shape 16x8 mm Gems(38) |
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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 16 mm x 8 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 -> 10 
Purchase process is easy. Make the selection online and pay for it. About a week to 10 days later the stone shows up. Very easy and on time.
Overall Rating -> 10
Great site easy to find what I'm looking for
Overall Rating -> 10
Lightning fast shipping, high quality, the stones I bought were described and pictured in minute detail. I got exactly what I ordered and are very well pleased.
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 -> 8 
I like to use GemSelect for finding calibrated sizes of gemstones. I purchased sapphires a few years ago and found the quality to be outstanding so I went ahead and purchased some more today (different) and some really unique moonstone. I'm opening a jewelry busy soon and so accurate gemstone sizes, quality, and reliability as a supplier is really important to me. Gemselect seems to fill all those requirements.
Overall Rating -> 10
Problem loading new arrivals from the email link
Overall Rating -> 8
Great selection, good prices and beautiful, simple user interface.
Overall Rating -> 7 
I ordered tsavorite garnet. It wasn’t quite as vidid color as I was expecting. Still a nice stone
Overall Rating -> 10
what i like is the variety, the search options. Would like a few more pictures though of each gem
Overall Rating -> 10
great products - found just some trying time to narrow in on the exact size - price combination. Also wasnt real clear wher they were shipping from until they got here..and then just breathtaking stones, well documented stats, in ,my hand...thank you! Diane Davis
Overall Rating -> 10
I have been shopping with Jim select for quite a few years. The descriptions of the gyms are accurate and the selection is very broad. Anyone looking for loose gyms, this is the place to go. Check out is easy.Pricing is very reasonable.
Overall Rating -> 8
purchased birthstones to be mounted into stud earrings as a gift for a friend's gift
Overall Rating -> 10
The merchant responded quickly to me questions. Wish I could afford more...haha
Overall Rating -> 10
Every aspect of the purchase from selection to receipt was easy and quick. Sometimes I go through my items just to admire my purchase.
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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  |
