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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 "P"

Gemstone Crystal System Density Hardness Refractive index Treatments

pearl
Pearl

organic 2.70 2.4-4.0 1.530-1.685 dying,bleaching

peridot
Peridot

orthorhombic 3.34 6.5-7.9 1.654-1.690 none

petalite
Petalite

monoclinic 2.40 6.0-6.5 1.504-1.56 none known

petalite
Phenakite

trigonal 2.95 7.5-8.0 1.654-1.670 none known

petalite
Phosphophyllite

monoclinic 3.08 3.0-3.5 1.595-1.616 none known

prosopite
Prosopite

monoclinic 2.88 4.5 1.501-1.510 none known

pyrite
Pyrite

cubic 5.00 5.0-6.5 2.940-3.220 none