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	hexagonal	3.60	3.5-4.5	1.597-1.817	none known
Rhodonite	triclinic	3.50	5.5-6.5	1.733-1.747	none known
Rhodolite	cubic	3.84	7.0-7.5	1.760	none
Ruby	hexagonal	4.00	9	1.762-1.770	heat, fracture filling