New Arrivals Pairs Lots Contact
  : Star Cabochon Gemstones
Shop By






Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (175): 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:
ID: 4140071 pcs
4.32ct Star Moonstone
10.73mm x 8.65mm x 6.23mm
USD 17.28
Item in Stock
ID: 4040051 pcs
71.36ct Star Garnet
26.99mm x 21.20mm x 11.97mm
USD 214.08
Item in Stock
ID: 2709041 pcs
20.07ct Star Moonstone
17.95mm x 15.50mm x 10.05mm
USD 80.28
Item in Stock
ID: 4141471 pcs
40.47ct Star Garnet
20.27mm x 8.36mm
USD 121.41
Item in Stock
ID: 4140941 pcs
6.47ct Star Moonstone
10.90mm x 9.86mm x 7.89mm
USD 25.88
Item in Stock
ID: 4140371 pcs
30.27ct Star Garnet
17.75mm x 13.76mm x 10.78mm
USD 90.81
Item in Stock
ID: 3734561 pcs
81.22ct Star Lemon Quartz
23.69mm x 19.33mm
USD 243.66
Item in Stock
ID: 4140011 pcs
5.96ct Star Moonstone
13.22mm x 9.65mm x 6.22mm
USD 23.84
Item in Stock
ID: 3506601 pcs
7.01ct Star Sapphire
12.44mm x 9.68mm x 5.17mm
USD 135.36
Item in Stock
ID: 3547641 pcs
270.20ct Star Rose Quartz
37.22mm x 27.67mm
USD 540.40
Item in Stock
ID: 3858561 pcs
12.80ct Star Sapphire
14.20mm x 11.89mm x 6.25mm
USD 192.00
Item in Stock
ID: 4141511 pcs
38.73ct Star Garnet
20.48mm x 8.57mm
USD 116.19
Item in Stock
ID: 2135221 pcs
19.71ct Star Moonstone
17.79mm x 9.36mm
USD 78.84
Item in Stock
ID: 4141481 pcs
56.81ct Star Garnet
23.20mm x 18.82mm x 11.42mm
USD 170.43
Item in Stock
ID: 3906521 pcs
10.43ct Star Sapphire
13.19mm x 10.44mm x 6.57mm
USD 156.45
Item in Stock
ID: 3875281 pcs
6.59ct Star Sapphire
11.52mm x 8.55mm x 6.20mm
USD 131.80
Item in Stock
ID: 4141891 pcs
3.76ct Star Moonstone
10.21mm x 8.17mm x 6.17mm
USD 15.04
Item in Stock
ID: 3906461 pcs
10.24ct Star Sapphire
13.09mm x 10.55mm x 6.39mm
USD 153.60
Item in Stock
ID: 4141001 pcs
8.80ct Star Moonstone
13.89mm x 9.58mm x 8.54mm
USD 35.20
Item in Stock
ID: 3508841 pcs
10.52ct Star Sapphire
13.92mm x 10.88mm x 6.26mm
USD 203.14
Item in Stock
ID: 3876871 pcs
4.01ct Star Sapphire
12.22mm x 8.34mm x 3.27mm
USD 80.20
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.
English speaking customer support only

Toll Free - USA & Canada only:


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