search
  • English speaking customer support only

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

    International:
    +66-39303404

  • Change Language
  • USD
Buy Customized Gemstone Lots
Shop By

Single

Pairs

Lots

Faceted

Cab

Gemtype Color Shape Weight Size Clarity Price Origin
You Selected (0): Cassiterite Clear All
Sort By:
Cassiterite

Cassiterite is a tin oxide mineral, and is the primary ore for tin. In addition to its important industrial use, it has some interesting properties that make high quality crystals valuable as gemstones. Cassiterite is reasonably hard, with a rating on the Mohs scale of 6 to 7. It tends to be opaque though thin crystals can be translucent. Its chief virtue is its multiple crystal faces and outstanding luster. Many specimens are graded as having "adamantine" (diamond-like) or submetallic luster.

Cassiterite is one of the densest gem materials known. It also has a very high refractive index, higher than zircon, sphene and demantoid garnet.

Certified Customer Reviews
Overall Rating -> 10 star ratings
The site had so many different stones and they were very affordably priced
Posted By Manimal in December, 2018
Source: Bizrate
Overall Rating -> 9 star ratings
Good stones and easy to use website
Posted By Wilsondesigns in December, 2018
Source: Bizrate
Overall Rating -> 9 star ratings
All is good
Posted By T in December, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
nice collection of jewels at a fair price
Posted By Bob in December, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
The website is easy to use, and there is a wonderful selection of gem stones to choose from. The prices are reasonable.
Posted By LoveGems in December, 2018
Source: Bizrate
Overall Rating -> 9 star ratings
simple, clear, well organized site
Posted By Lleb in December, 2018
Source: Bizrate
Popular Gemstones
All Gemstones (144)
A B C D E F G H I J K L M O P Q R S T V Z
English speaking customer support only

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

International:
+66-39303404

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

Update Translation
 
Current Value
New Value
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