Jewelry New Arrivals Pairs Lots Contact
  : Star Cabochon Gemstones
Shop By

Single

Pairs

Lots

Faceted

Cab

Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (165): Star Cabochon Gemstones Star Sapphire, Star Ruby, Star Moonstone, Star Rose Quartz, Star Diopside, Star Sunstone, Star Garnet, Star Lemon Quartz Clear All
Sort By:
Compare
ID: 3256251 pcs
31.18ct Star Garnet
17.50 x 14.10 x 11.31mm
USD 155.90
Quantity
Item in Stock
Compare
ID: 3506471 pcs
7.83ct Star Sapphire
13.77 x 9.57 x 5.11mm
USD 151.20
Quantity
Item in Stock
Compare
ID: 3258141 pcs
17.25ct Star Moonstone
17.86 x 14.00 x 9.45mm
USD 69.00
Quantity
Item in Stock
Compare
ID: 4031961 pcs
13.75ct Star Moonstone
15.92 x 11.76 x 11.08mm
USD 48.54
Quantity
Item in Stock
Compare
ID: 4139681 pcs
18.80ct Star Moonstone
15.57 x 13.98 x 11.63mm
USD 75.20
Quantity
Item in Stock
Compare
ID: 4040111 pcs
159.09ct Star Garnet
32.28 x 29.05 x 16.02mm
USD 477.27
Quantity
Item in Stock
Compare
ID: 3052481 pcs
121.00ct Star Rose Quartz
28.56 x 27.18 x 21.31mm
USD 266.20
Quantity
Item in Stock
Compare
ID: 4040031 pcs
57.41ct Star Garnet
23.79 x 21.00 x 10.57mm
USD 172.23
Quantity
Item in Stock
Compare
ID: 4141471 pcs
40.47ct Star Garnet
20.27 x 8.36mm
USD 121.41
Quantity
Item in Stock
Compare
ID: 3858501 pcs
13.08ct Star Sapphire
13.82 x 11.12 x 7.34mm
USD 196.20
Quantity
Item in Stock
Compare
ID: 4141041 pcs
7.34ct Star Moonstone
12.83 x 9.35 x 7.92mm
USD 29.36
Quantity
Item in Stock
Compare
ID: 4141031 pcs
7.70ct Star Moonstone
16.70 x 9.98 x 5.99mm
USD 30.80
Quantity
Item in Stock
Compare
ID: 4140121 pcs
5.92ct Star Moonstone
13.01 x 10.45 x 6.21mm
USD 23.68
Quantity
Item in Stock
Compare
ID: 3906531 pcs
5.61ct Star Sapphire
10.43 x 7.77 x 5.67mm
USD 84.15
Quantity
Item in Stock
Compare
ID: 4140021 pcs
5.46ct Star Moonstone
12.43 x 9.68 x 6.24mm
USD 21.84
Quantity
Item in Stock
Compare
ID: 4140071 pcs
4.32ct Star Moonstone
10.73 x 8.65 x 6.23mm
USD 17.28
Quantity
Item in Stock
Compare
ID: 4141331 pcs
32.73ct Star Garnet
19.47 x 16.24 x 9.11mm
USD 98.19
Quantity
Item in Stock
Compare
ID: 4141421 pcs
45.93ct Star Garnet
20.79 x 18.14 x 10.60mm
USD 137.79
Quantity
Item in Stock
Compare
ID: 3506401 pcs
32.74ct Star Sapphire
19.42 x 16.43 x 8.30mm
USD 892.49
Quantity
Item in Stock
Compare
ID: 3153731 pcs
10.60ct Star Moonstone
13.86 x 12.50 x 9.08mm
USD 42.40
Quantity
Item in Stock
Compare
ID: 4141511 pcs
38.73ct Star Garnet
20.48 x 8.57mm
USD 116.19
Quantity
Item in Stock
1
2
3
4
5
6
7
8
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.
English speaking customer support only

Toll Free - USA & Canada only:
1-800-464-1640

International:
+66-39303404

Reorder Items

Save Money
No shipping Fees for Additional Items!
$6.99 Worldwide Shipping

GemSelect Gemstones
X Close Window
Colored Gemstones
X Close Window
Colored Gemstones
X Close Window
Colored Gemstones
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