Showing 289–384 of 507 results

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  Native Osmium + Iridium

  $2,500
• 

  Nickeline on Annabergite

  $90
• 

  NWA Meteorites

  $20
• 

  Obsidian

  $1
• 

  Oil Shale

  $40
• 

  Orpiment

  $30
• 

  Osmiridium

  $4,200
• 

  Parapierrotite on Realgar

  $75
• 

  Pascoite

  $75
• 

  Pascoite

  $90
• 

  Pascoite, Rossite & Metarossite

  $85
• 

  Pentlandite

  $150
• 

  Pentlandite

  $120
• 

  Pentlandite in Pyrrhotite

  $800
• 

  Perroudite

  $65 – $100
• 

  Petedunnite

  $40
• 

  Petrified Wood

  $65
• 

  Petrified Wood

  $35
• 

  Petrified Wood

  $30
• 

  Petrified Wood

  $25
• 

  Petrified Wood

  $25
• 

  Petrified Wood

  $25
• 

  Petrified Wood

  $15
• 

  Petrified Wood

  $15
• 

  Petrified Wood

  $25
• 

  Phenakite

  $75 – $150
• 

  Phenakite on Smoky Quartz

  $110
• 

  Phosinaite-(Ce) on Ussingite

  $90
• 

  Phosinaite-Ce

  $150
• 

  Pickeringite

  $75
• 

  Polished Barite

  $40
• 

  Pollucite

  $80
• 

  Pollucite

  $80
• 

  Pollucite

  $80
• 

  Pollucite

  $75
• 

  Pollucite

  $25 – $80
• 

  Pottery

  $200
• 

  Probertite

  $80
• 

  Prosopite

  $95
• 

  Psilomelane

  $30
• 

  Purpurite

  $35
• 

  Purpurite

  $80
• 

  Pyracmonite

  $95
• 

  Pyrite & Galena on Quartz

  $70
• 

  Pyrite Ammonite

  $25
• 

  Pyrite Cube

  $25
• 

  Pyrite on Fluorite

  $120
• 

  Pyrite on Sphalerite

  $175
• 

  Pyrochlore

  $100
• 

  Pyroxmangite

  $40 – $100
• 

  Pyroxmangite

  $60
• 

  Quartz

  $250
• 

  Quartz

  $200
• 

  Quartz & Pyrite on Tetrahedrite

  $150
• 

  Quartz Crystal

  $25
• 

  Quartz Crystal

  $25
• 

  Quartz on Stibnite

  $80
• 

  Quartz, Galena & Pyrite

  $75
• 

  Quartz, Galena & Pyrite

  $70
• 

  Radian Barite

  $400
• 

  Rasvumite on Pyrrhotite

  $95
• 

  Renierite

  $1,500
• 

  Renierite

  $2,000
• 

  Renierite

  $1,750
• 

  Renierite & Germanite

  $300
• 

  Rheniite

  $4,000
• 

  Rheniite

  $750
• 

  Rheniite

  $500
• 

  Rhenium-bearing Molybdenite

  $1,000
• 

  Rhenium-bearing Molybdenite

  $2,400
• 

  Rhodochrosite

  $200
• 

  Rhodochrosite

  $80
• 

  Rhodochrosite

  $250
• 

  Rhodochrosite

  $140
• 

  Rhodochrosite

  $150
• 

  Rhodochrosite

  $125
• 

  Rhodochrosite

  $70
• 

  Rhodochrosite

  $400
• 

  Rhodochrosite

  $165
• 

  Rhodochrosite

  $140
• 

  Rhodochrosite

  $275
• 

  Rhodochrosite & Quartz on Sphalerite

  $150
• 

  Rhodonite on Galena

  $85
• 

  Riebeckite

  $70
• 

  Riebeckite

  $75
• 

  Roasted Gold

  $325
• 

  Roquesite

  $30,000
• 

  Roscoelite

  $85
• 

  Rosetta Lace Agate #1

  $25
• 

  Rosetta Lace Agate #2

  $25
• 

  Rosetta Lace Agate #3

  $250
• 

  Rosetta Lace Agate #4

  $25
• 

  Rosetta Lace Agate #5

  $25
• 

  Rosetta Lace Agate #6

  $25
• 

  Rutheniridosmine

  $300
• 

  Samarskite

  $200