Site Contents

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
Malachite

microcrystalline 3.95 3.5-4.0 1.660-1.910 reconstitution

marcasite
Marcasite

orthorhombic 4.8-4.9 6.0-6.5 - none

mawsitsit
Maw Sit Sit

aggregate 2.5 - 3.5 6.0-7.0 1.52 - 1.74 none

moldavite
Moldavite

amorphous 2.40 5.50 1.50 none

moonstone
Moonstone

monoclinic 2.56 6.0-6.5 1.518-1.526 none

morganite
Morganite

hexagonal 2.72 7.5-8.0 1.577-1.583 radiation