Tourmaline in quartz - Ploubalay, Côtes-d'Armor, France
Incomplete black tourmaline in quartz from Ploubalay,...
Barite - Mine des Malines, Saint-Laurent-le-Minier, Gard, France
Large piece of white barite pompons from the Malines mine in...
Chalcedony - Charroux, Vienne, France
A nicely contrasting matte surface for this chalcedony...
Chalcedony - Charroux, Vienne, France
Half-geode of white mamelonned chalcedony, from the Charroux...
Chalcedony - Charroux, Vienne, France
Blue to beige mamelony chalcedony half-geode from the Charroux...
Gypsum - Angervilliers, Essonne, France
Group of translucent gypsum crystals from the Angervilliers...
Faden quartz - La Table, Savoie, France
Bright, translucent faden quartz from La Table in Savoie,...
Goethite psm after pyrite - Agos-Vidalos, Hautes-Pyrénées, France
Pyrite pseudomorphosed into goethite from Agos-Vidalos in the...
Chalcedony cluster - Mamuju, Sulawesi island, Indonesia
Botryoidal amethyst nicknamed “cluster chalcedony” or “cluster...
Aurichalcite and calcite - Ojuela Mine, Mapimi, Durango, Mexico
Turquoise-blue aurichalcite under colorless calcite crystals...
Dioptase - Ntola mine, Mindouli mining district, Congo
Piece composed of numerous small, bright dioptase crystals.3 x...
Dioptase - Ntola mine, Mindouli mining district, Congo
Piece composed of numerous small, bright dioptase crystals.3 x...
Crocoïte - Red Lead Mine, Tasmania, Australia.
Bright orange-red crocoite crystals on limonite matrix.5.5 x 3...
Quartz and tourmaline - Minas Gerais, Brazil
Quartz combined with long black tourmaline baguettes. The...
Amethyst quartz - Piedra Parada, Veracruz, Mexico
Airborne specimen of lightly amethysted quartz from Veracruz,...
Pyrite - Navajun, La Rioja, Spain
Pyrite cubes of superb brilliance and very good condition,...
Spinel in marble - Luc Yen, Yen Bai Province, Vietnam
Small red spinel octahedrons on white marble matrix.11 x 5 x 4...
Stolzite on scheelite, and quartz - Santiago de Chuco, Peru
Bright yellow stolzite, delicately set on small scheelite...
Calcite - Ojuela Mine, Mapimi, Durango, Mexico
Colorless hexagonal calcite with relatively thick petals and...
Garnet - Pic de Costabonne, Pyrénées-Orientales, France
An old sample of grossular garnets or andradites, including a...
Actinolite, pyrite - Arignac, Ariège, France
Green-banded actinolite with copper-bright pyrite on a matrix...
Pyrite on Talc - Trimouns, Luzenac, Ariège, France
Curved pyrite octahedrons of fine quality and brilliance on...
Native arsenic - Filon Saint-Jacques, Neuenberg,...
Not common! Native arsenic showing natural dissolution. This...
Smoky quartz - Mooralla, Victoria, Australia
Set of smoky, fairly bright quartz of fine quality.3.7 x 2.9 x...
Smoky quartz - Mooralla, Victoria, Australia
Group of smoky and biterminated quartz from a small Australian...
Smoky quartz - Mooralla, Victoria, Australia
Group of smoky and biterminated quartz from a small Australian...
Fluorite - Dalnegorsk mining district, Russia
Dalnegorsk fluorites are renowned for the purity of their...
Quartz and siderite - Allevard, Isère, France
Set of quartz points, one of which is biterminated, with shiny...
Wavellite - Mauldin, Arkansas, USA
Small piece composed of several wavellite spheres of different...
Wavellite - Mauldin, Arkansas, USA
Small piece composed of several wavellite spheres of different...