Brian Kosnar Mineral Classics
Ship from USA · 710 items · On Agora since 2026
Showing 501–520 of 710 items
vivianite (notably "bent" crystals)
vivianite on matrix
vivianite
vivianite on matrix (doubly terminated)
vivianite (doubly terminated)
opal replacing bivalve fossil
cuprite on chrysocolla
fluorite
calcite (var: manganoan) with calcite and lollingite
natrolite (rare crystallized specimen!!)
spodumene (var: kunzite) (gem floater crystal)
vauxite with paravauxite, metavauxite and sigloite
mimetite
diopside (chromian diopside)
chrysoberyl
opal-an (hyalite opal)
spinel
quartz "cast" after calcite
petrified wood with banded agate (incredibly rare color)
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