Alphabetical
Gemstone List
Click
on a letter for a list of gems:
A| B| C| D| E| F| G| H| I| J| K| L| M| N| O| P| Q| R| S| T|U| V| W| X|Y |Z
Gemstones that begin
with the letter "Z"
Gemstone |
Crystal
System |
Density |
Hardness |
Refractive
index |
Treatments |
Zircon |
tetragonal |
4.00 |
6.50 |
1.810-1.815 |
heat |