Si – Silicon

Showing 1–100 of 150 results

• 

  Agate

  $20
• 

  Agate

  $20
• 

  Agate

  $20
• 

  Agate

  $25
• 

  Agate Turritella

  $20
• 

  Allanite-Nd

  $300
• 

  Almandine Garnet

  $40
• 

  Amazonite

  $25
• 

  Amazonite #2

  $30
• 

  Amethyst #12

  $35
• 

  Amethyst Epimorph #11

  $40
• 

  Apophyllite

  $25
• 

  Aquamarine

  $95
• 

  Aquamarine & Smoky Quartz

  $115
• 

  Bavenite

  $55
• 

  Bazzite

  $950
• 

  Biotite

  $30
• 

  Black Kyanite

  $15
• 

  Blue Agate

  $25
• 

  Blue Agate

  $25
• 

  Blue Agate

  $35
• 

  Blue Agate

  $25
• 

  Blue Kyanite

  $15
• 

  Bumblebee Jasper?

  $25
• 

  Bumblebee Jasper?

  $25
• 

  Bustamite

  $75
• 

  Cascandite & Thortveitite

  $150
• 

  Cassiterite on Zinnwaldite

  $95
• 

  Chabazite

  $45
• 

  Chalcedony

  $80
• 

  Chalcedony Geode

  $20
• 

  Chalcedony Geode

  $25
• 

  Chalcedony Geode

  $20
• 

  Chalcedony Geode

  $20
• 

  Chalcopyrite & Sphalerite

  $125
• 

  Chalcopyrite & Sphalerite

  $95
• 

  Chalcopyrite & Sphalerite

  $150
• 

  Chrome-Tremolite

  $45
• 

  Clinochlore var. Diabantite

  $45
• 

  Clinochlore var. Kotschubeite

  $65
• 

  Creaseyite

  $65
• 

  Cummingtonite

  $90
• 

  Diopside

  $18
• 

  Druzy Agates

  $25 – $60
• 

  Emerald

  $20
• 

  Epidote

  $90
• 

  Epidote

  $80
• 

  Epidote, Orthoclase

  $25
• 

  Ethiopian Opal

  $25
• 

  Fassaite?

  $25
• 

  Ferrierite-NH₄

  $220
• 

  Ferruginous Red Quartz

  $220
• 

  Fluorite

  $75 – $85
• 

  Franklinite, Zincite & Willemite

  $55
• 

  Gadolinite-Y

  $250
• 

  Galena & Pyrite on Quartz

  $65
• 

  Gallian Allanite-Ce

  $450
• 

  Gold on Pyrite w Quartz

  $1,500
• 

  Hafnon

  $50,000
• 

  Hemimorphite

  $65
• 

  Heulandite

  $55
• 

  Jasper

  $35
• 

  Keiviite-Y

  $120
• 

  Kolbeckite

  $200
• 

  Labradorite

  $45
• 

  Large Amazonite

  $45
• 

  Large Amethyst Epimorph Cluster w Degassing Vent

  $350
• 

  Lepidolite

  $45
• 

  Lepidolite

  $45
• 

  Limonite on Smoky Quartz

  $85
• 

  Microcline

  $45
• 

  Molybdenite on Quartz

  $65
• 

  Mt. Antero Aquamarine

  $120
• 

  Mt. Antero Aquamarine

  $350
• 

  Mt. Antero Aquamarine

  $350
• 

  Muscovite Mica

  $1
• 

  Muscovite Mica, Orthoclase

  $45
• 

  Orthoclase, Quartz, Mica, Pegmatite

  $1 – $50
• 

  Pegmatite

  $25
• 

  Petedunnite

  $45
• 

  Phenakite

  $75 – $150
• 

  Phenakite on Smoky Quartz

  $120
• 

  Phosinaite-(Ce) on Ussingite

  $95
• 

  Phosinaite-Ce

  $150
• 

  Pollucite

  $80
• 

  Pollucite

  $80
• 

  Pollucite

  $80
• 

  Pollucite

  $80
• 

  Pollucite

  $25 – $80
• 

  Pyrite & Galena on Quartz

  $70
• 

  Pyrite on Fluorite

  $125
• 

  Pyroxmangite

  $40 – $100
• 

  Pyroxmangite

  $60
• 

  Quartz

  $200
• 

  Quartz Crystal

  $25
• 

  Quartz, Galena & Pyrite

  $80
• 

  Quartz, Galena & Pyrite

  $75
• 

  Quartz, Pyrite and Tetrahedrite

  $150
• 

  Rhodochrosite

  $175
• 

  Rhodonite on Galena

  $85