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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (172): Star Cabochon Gemstones Star Sapphire, Star Ruby, Star Moonstone, Star Rose Quartz, Star Diopside, Star Sunstone, Star Garnet, Star Lemon Quartz Clear All
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ID: 3734551 pcs
89.17ct Star Lemon Quartz
25.23mm x 23.98mm x 19.62mm
USD 267.51
Item in Stock
ID: 4040031 pcs
57.41ct Star Garnet
23.79mm x 21.00mm x 10.57mm
USD 172.23
Item in Stock
ID: 4141051 pcs
8.56ct Star Moonstone
12.68mm x 10.21mm x 8.39mm
USD 34.24
Item in Stock
ID: 4141041 pcs
7.34ct Star Moonstone
12.83mm x 9.35mm x 7.92mm
USD 29.36
Item in Stock
ID: 3072881 pcs
311.65ct Star Rose Quartz
43.53mm x 42.00mm x 24.42mm
USD 623.30
Item in Stock
ID: 3506591 pcs
6.22ct Star Sapphire
12.64mm x 8.53mm x 5.14mm
USD 120.11
Item in Stock
ID: 3052481 pcs
121.00ct Star Rose Quartz
28.56mm x 27.18mm x 21.31mm
USD 266.20
Item in Stock
ID: 2621091 pcs
15.93ct Star Moonstone
14.19mm x 13.36mm x 11.53mm
USD 63.72
Item in Stock
ID: 4141381 pcs
35.84ct Star Garnet
22.97mm x 17.93mm x 7.75mm
USD 107.52
Item in Stock
ID: 4139731 pcs
8.03ct Star Moonstone
18.13mm x 11.05mm x 5.28mm
USD 32.12
Item in Stock
ID: 4033101 pcs
24.71ct Star Moonstone
16.79mm x 12.70mm
USD 87.23
Item in Stock
ID: 3506551 pcs
8.00ct Star Sapphire
11.30mm x 9.95mm x 5.90mm
USD 154.48
Item in Stock
ID: 3734561 pcs
81.22ct Star Lemon Quartz
23.69mm x 19.33mm
USD 243.66
Item in Stock
ID: 4139681 pcs
18.80ct Star Moonstone
15.57mm x 13.98mm x 11.63mm
USD 75.20
Item in Stock
ID: 3547621 pcs
579.55ct Star Rose Quartz
57.01mm x 45.75mm x 34.63mm
USD 1159.10
Item in Stock
ID: 4040091 pcs
93.53ct Star Garnet
29.36mm x 24.28mm x 12.24mm
USD 280.59
Item in Stock
ID: 3801961 pcs
52.01ct Star Garnet
21.20mm x 17.93mm x 11.98mm
USD 260.05
Item in Stock
ID: 4141391 pcs
38.23ct Star Garnet
21.26mm x 16.98mm x 9.61mm
USD 114.69
Item in Stock
ID: 2231741 pcs
30.49ct Star Sapphire
18.85mm x 17.41mm x 7.76mm
USD 533.57
Item in Stock
ID: 4141411 pcs
43.14ct Star Garnet
23.15mm x 18.96mm x 8.99mm
USD 129.42
Item in Stock
ID: 3801941 pcs
47.52ct Star Garnet
18.56mm x 12.01mm
USD 237.60
Item in Stock
Star Cabochon 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.

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. 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 properly shape and orient the stones.
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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

Size Comparison Chart