Black tourmaline - Erongo Mountains, Namibia
Group of black tourmaline crystals (schorl variety), with a...
Group of black tourmaline crystals (schorl variety), with a...
Quartz of the amethyst variety from Indonesia known by the...
Botryoidal chalcedony with green colour due to celadonite...
Quartz of the amethyst variety from Indonesia known by the...
Spherical crystals of evansite (rare amorphous aluminium...
Light blue evansite crystals (rare amorphous aluminium...
Very nice little set of very bright and perfectly formed...
Very nice epidote crystal from the Bellecombe rodingites in...
Piece composed of small apple green spheres of wavellite.3 x...
Small piece made of shiny wavellite spheres, the larger one...
A set of small, very well formed and bright grossular garnets...
Small calcite scalenohedrons of a beautiful deep orange on...
Small calcite scalenohedrons of a beautiful deep orange on...
Single crystal of colorless fluorite with a superb...
Set of bright barite crystals with the typical white border of...
Botryoidal gibbsite of a beautiful blue colour from China.3,2...
Hematite and rutile in epitaxy. This coin is the result of a...
A deep violet fluorite antozonite, with bright surfaces, and...
Colourless but shiny hexagonal calcite crystals accompanied by...
Several small discs of royal blue azurite on a white kaolinite...
Microcrystals of green pyromorphite on a granitic matrix...
Black tourmaline crystals (schorl variety), with a superb...
Botryoidal amethyst quartz, commonly known as " grape agate ",...
Superb dodecahedral pyrite crystal of extreme brilliance,...
Bright orange-red crocodile crystals on limonite matrix.7 x 5...
Vanadinite brilliant and of a beautiful bright red color.2 x...
Pyromorphite with a nice apple green colour and very...
Electric blue cavansite crystals on stilbite, a nice little...
Group of translucent gypsum crystals from the old quarry of...
Group of hyaline quartz in perfect condition with a thick...