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 "P"

Gemstone	Crystal System	Density	Hardness	Refractive index	Treatments
Pearl	organic	2.70	2.4-4.0	1.530-1.685	dying,bleaching
Peridot	orthorhombic	3.34	6.5-7.9	1.654-1.690	none
Petalite	monoclinic	2.40	6.0-6.5	1.504-1.56	none known
Phenakite	trigonal	2.95	7.5-8.0	1.654-1.670	none known
Phosphophyllite	monoclinic	3.08	3.0-3.5	1.595-1.616	none known
Prosopite	monoclinic	2.88	4.5	1.501-1.510	none known
Pyrite	cubic	5.00	5.0-6.5	2.940-3.220	none