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Buy Star Gemstones

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Star Gemstones

Why buy Star Gemstones?

In the world of gemstones, there is a small but special group of gems known to exhibit chatoyancy, either in the form of 'simple' chatoyancy, cat's eye chatoyancy or asterism (star chatoyancy). Gems that display the star effect are rare and fascinating. Chatoyancy is one of several forms of optical phenomena; other forms of optical phenomena include (but are not limited to) color-change, iridescence (the rainbow effect) and adularescence (shimmering light).

Gems which display chatoyancy are known as 'phenomenal gemstones' and are heavily prized by jewelers and collectors for their rare and unique visible traits. The star phenomena is known to occur in only a handful of different gem types, such as star sapphire, star ruby, star garnet, star quartz, star moonstone and star diopside.

What are some of the properties of Star Gemstones?

The value of star gemstones usually depends on the clarity of the 'star'. Gems which display sharp, clear and well-centered stars are generally considered to be of higher quality. In addition, gems which show stars from wider angles and under all different types of lighting are valued the most.

Most star gemstones will often show their chatoyancy only when viewed under a single strong and focused light source; it is usually very difficult to see any asterism under diffused light.

What are good ways to use Star Gemstones?

When viewing a star gemstone, it is best to use a flashlight or penlight while tilting the gem and light back and forth. This should cause the star to appear to glide across the stone's surface. Star gemstones are always cut en cabochon, as this is the best way to maximize chatoyancy.

Gem cutters must be careful when working with star gemstones, as it requires great skill to shape and orient the stones correctly. For these reasons, it is best to display star gemstones under intense light or in direct-light when wearing them.

Want to know more about Star Gemstones?

Read our Star Gemstones Information Page here.

Certified Customer Reviews
Overall Rating -> 10 star ratings
GemSelect has a vast selection of gemstones in various size, shape and price. I like it because the gems are precut and ready for the novice jewler. The website is very easy to navigate and purchasing was a breeze.
Posted By Mr. C in February, 2020
Source: Bizrate
Overall Rating -> 8 star ratings
It was super easy to find what i wanted and i loved how i can sort through the huge selection easily
Posted By Max in February, 2020
Source: Bizrate
Overall Rating -> 10 star ratings
This is my second time purchasing from Gem Select. I love this vendor and the website Full of info and if there’s any problems or questions customer service has been stellar at Making the experience a great one.
Posted By Tmpbjur in February, 2020
Source: Bizrate
Overall Rating -> 8 star ratings
seems like a good place to purchase a gem
Posted By Jane in February, 2020
Source: Bizrate
Overall Rating -> 10 star ratings
First, I wanted to say that you guys have a great selection gems, in all price ranges! Awesome site!! My son found a 6 piece set of blue topaz hearts that he wanted to get. I wanted to view all of the 6 piece sets or 10 piece sets. I recommend adding that ability to your filter.
Posted By Mike in February, 2020
Source: Bizrate
Overall Rating -> 10 star ratings
Everything came in as expected. This was a great experience and I will order from here again.
Posted By Sam in February, 2020
Source: Bizrate
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Size and Weight

Gems are always measured in Millimeter (mm)

Dimensions are given as;
length x width x depth,
except for round stones which are;
diameter x depth

Select gems by size, not by weight!
Gem varieties vary in density, so carat weight is not a good indication of size

Note: 1ct = 0.2g

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