Amethyst, SEM
Amethyst crystals
Amethyst geode
Amethyst
Cursed amethyst
Agate in amethyst
Amethyst filled geode
Amethyst geode interior
Amethyst and chalcedony
Prismatic amethyst crystal
Heat-treated amethyst
Amethyst geodes
Amethyst gem
Amethyst gemstones
Tool holding amethyst gemstone
Oval cut amethyst
Round cut amethyst
Pear cut amethyst
Raw amethyst crystal
Amethyst crystals, light micrograph
Amethyst, a quartz crystal
Calcite on amethyst
Single amethyst crystal, close up
Amethyst crystals in an agate geode
Mass of pyramid-shaped amethyst crystals
Amethyst gemstone
Sand, SEM
Amethyst gemstones and crystal
Square cut purple Amethyst gemstone
Oval amethyst
Chevron Amethyst Crystal Gemstone
Amethyst crystals, Guanajuato, Mexico
Amethyst Geode opened
Microdiamond crystal
Quartz types
Amethyst quartz birthstone
Round cut tanzanite
Jasper, polarised light micrograph
Garnets in micaschist, light micrograph
Mica in quartz, light micrograph
Rose quartz crystals, SEM
Black tourmaline, SEM
Lapis lazuli, SEM
Amethyst druse (crystals in a rock cavity)
Malachite, SEM
Ruby crystals, SEM
Kimberlite rock, light micrograph
Garnet mica schist thin cut, polarised light micrograph
Snowball garnet, light micrograph
Gneiss with garnet, light micrograph
Mylonite, light micrograph
アメジスト
Emerald, SEM
Amphibolite, light micrograph
Agate. polarised light micrograph
Gneiss, thin section, polarised LM
Tourmaline mineral, light micrograph
Tweezers holding small purple diamond, close-up
Jasper
Jasper breccia rock
Blue sapphire stone
Blue Sapphire uncut stone
Opal gem necklace
Jade stone
Garnet gemstone
Schorl and quartz crystals in groundmass
Asscher cut diamond gemstone
Pink diamonds
Amethyst stone
Quartzite mineral, light micrograph
Healing stones amethyst
Agate, polarised light micrograph
Banded Amethyst stone
Quartz crystals, SEM
Mixed-cut amethyst and diamond ring
Tourmaline crystals in quartz
Citrine
Hawk's Eye quartz stone
Schorl tourmaline crystal stone
Quartz monzonite
Quartz boulder
Brecciated quartz
Herkimer diamonds
Biomineralisation bacteria, SEM
Tourmaline crystal, thin section
Kelephytic corona, light micrograph
Lherzolite rock, light micrograph
Eclogite rock, light micrograph
Pyroxenite rock, light micrograph
Dunite rock, light micrograph
Olivine flakes, light micrograph
Peridotite rock, light micrograph
Geode, thin section micrograph
Woman holding two halves of Amethyst stone with quartz inside, Atlas Mountains, Morocco
Tourmaline mica in slate
Elbaite on albite and quartz
Amethyst crystal
Lasa marble, light micrograph
Quartz nodule, polarised light micrograph
Sand grains, SEM
Mica schist folds, light micrograph
Granodiorite rock, light micrograph
Melaphyr rock, light micrograph
Orthogneiss, light micrograph
Graphic granite rock, light micrograph
Amethyst Crystal Healing Stone
Citrine.
Citrine crystals
Opal gemstone
Rutilated Amethyst Crystal Healing Stone
Lapis lazuli specimen
Boulder opal formation
Polished and cut turquoise
Opal specimen and cut stone
Granite specimen