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 "M"
Gemstone |
Crystal
System |
Density |
Hardness |
Refractive
index |
Treatments |
Malachite
|
microcrystalline |
3.95 |
3.5-4.0 |
1.660-1.910 |
reconstitution |
Marcasite
|
orthorhombic |
4.8-4.9 |
6.0-6.5 |
- |
none |
Maw
Sit Sit
|
aggregate |
2.5
- 3.5 |
6.0-7.0 |
1.52 - 1.74 |
none |
Moldavite
|
amorphous |
2.40 |
5.50 |
1.50 |
none |
Moonstone
|
monoclinic |
2.56 |
6.0-6.5 |
1.518-1.526 |
none |
Morganite
|
hexagonal |
2.72 |
7.5-8.0 |
1.577-1.583 |
radiation |