Fibrous silicate
Filler (Sillitin Z 86), SEM
Amethyst crystals
Amethyst gemstones
Quartz
Agate surface
Molecular model of quartz
Mineral crystal
アメジスト
Polished agates
A polished sample of agate
Agate
Jasper
Quartz crystals
Rhyolitic geode
Jasper surface
Quartz crystal
Chalcedony rose
Green calcite crystal
Amethyst quartz birthstone
Quartz mineral stone
Quartz polished stone
Geode interior section
Three calcite crystals
Agate thunderegg
Polished carnelian stone
Polished tiger's eye stone
Red jasper mineral
Smoky quartz
Citrine crystals
Geode interior
Quartz mineral
Tourmaline crystals in quartz
Rutile quartz
Dendrites in agate
Polished slice of agate
Cut and polished piece of bloodstone
Cross section of blue agate, a type of chalcedony
Amethyst druse (crystals in a rock cavity)
Coloured slices of agate
Slice of agate, a form of quartz
Slice of agate, a chalcedony form of quartz
Green crystal
Blue crystal
Red crystal
Green Avanturine Quartz gemstone
Milky Quartz gemstone
Dyed agate slice
Celestite crystals
Specimen of rose quartz from Brazil
Agate, variety of mineral quartz
Banded texture in agate
Jasper breccia rock
Star sapphire stone
Smokey Quartz gemstone
Agate slice
Opal gemstone
Agate, polarised light micrograph
Rock microveins, light micrograph
Brecciated jasper
Agate stone cross section and patterns
Flame agate stone pattern
Agate stone patterns
Hessite in quartz
Herkimer diamonds
Raw citrine crystal
瑪瑙
Honey opal
Amethyst
Tweezers holding small purple diamond, close-up
Dendritic crystals in chalcedony
Healing quartz crystal
Agate geode
Carnelian agate
Chalcopyrite
Chrysocolla specimen
Amber citrine quartz stone
Pyromorphite specimen
Siderite specimen
Laguna agate
Agua Nueva agate
Mounted India dendritic agate
Moss Agate stone
Banded Amethyst stone
Beryl stone
Garnet gemstone
Jasper polished stone
Amethyst geode interior
Banded iron formation
Concentric banding in agate
Prismatic amethyst crystal
Oval polished green Chrysoprase
Mixed-cut amethyst and diamond ring
Citrine
Cut agate
Sodalite stone
Sulphur mineral crystal
Tiger eye gemstone
Tourmaline gemstones in quartz
Azurite copper ore stone
Cut and polished jasper
Botswana agate stones
Blue lace agate
Agate, artificially coloured
Cut agates
Slice of agate
Polished Esterel rhyolite agate
Tiger eye, light micrograph
Assortment of Red Gemstones
Quartz variety Herkimer Diamond
Carnelian
Sard Onyx layered Agate
Brecciated Agate stone
Healing stones amethyst
Crystal
Raw amethyst crystal
Quartzite metamorphic rock
Tourmaline in quartz
Amethyst gem
Bloodstone
Bloodstone specimen
Beryl in Quartz
Cut and polished agate
Iron oxide precipitation in agate
Smoky quartz crystals
Agate in amethyst
Moctezuma agate