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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 "R"

Gemstone Crystal System Density Hardness Refractive index Treatments

rhodochrosite
Rhodochrosite

hexagonal 3.60 3.5-4.5 1.597-1.817 none known

rhodonite
Rhodonite

triclinic 3.50 5.5-6.5 1.733-1.747 none known

rhodolite
Rhodolite

cubic 3.84 7.0-7.5 1.760 none

ruby
Ruby

hexagonal 4.00 9 1.762-1.770 heat, fracture filling