Polyhedral agate - Sitio Garguelo, Paraiba, Brazil
Polished slice of polyhedral agate, to be appreciated as such...
Polished slice of polyhedral agate, to be appreciated as such...
Floating single crystal of tabular quartz with smoky edges in...
Orange chalcedony stalagmite from near Sidi Rahal, Morocco.4.5...
A group of bright dioptases, with the main crystal measuring...
Fiber-terminated tourmaline crystal with a superb blue...
A group of differently oriented sceptered quartz amethysts,...
Large hematite slab crystallized on both sides, with a nice...
Well-balanced group of bright smoky quartz, associated with...
Set of smoky quartz of superb brilliance, well translucent and...
A crystallized front/back piece composed of subtly smoky...
Smoky quartz point with superb brilliance and transparency, in...
Let's not dwell on the unfortunate small damages present on...
Blue fluorite partially covered with quartz naturally colored...
Smoky quartz with two peaks, beautiful cognac color, superb...
Cavansite in nice-sized clusters as well as laterally in small...
Botryoidal quartz, commonly known as “cluster chalcedony”,...
Very airy construction for these bright, light-green prehnite...
Fluorite from the Beix mine, closed in 1977 and inaccessible...
Pseudo-spherical crystallization of deep violet fluorite,...
Lustrous smoky quartz crystal with superb transparency. Some...
Fibrous “crosse” or “ram's horn” gypsum, with a shine...
Fibrous “crosse” or “ram's horn” gypsum, with a shine...
Subtly scintillating, bright turquoise-blue hemimorphite with...
Red wulfenite, small bright bipyramidal prisms, from the...
The piece is composed of a first generation of green fluorite...
Piece in excellent condition, featuring superb deep orange...
Colorless, brilliant quartz combined with calcite in folded...
More than a dozen octahedral galena crystals on a sphalerite...
Bunch of bright brown/beige tabular baryte crystals, most of...
This piece is composed of hessonite garnets, including a...
Specimen of bright red vanadinite, associated with small...
Fully recrystallized violet fluorite, with well-marked inner...