9.9" Amethyst Geode Section with Calcite on Metal Stand - Uruguay

 
 
 
This is a gorgeous amethyst geode section from the famous amethyst mines near Artigas, Uruguay. Part of the "rind" has been polished to reveal the mineral formations underneath. The coloration of the crystals is a beautiful purple and there is a calcite crystal cluster at the center of this specimen.

The included custom metal display stand makes for a very aesthetic display.

While Brazil to the north is a much more prolific producer of amethyst, the amethyst mined near Artigas, Uruguay tends to be much darker with higher quality crystals. We import out material directly from the mines in Uruguay allowing us to offer it at better retail prices than anyone else. We carry a large variety of geodes, amethyst clusters, and collector quality crystal formations.

Amethyst being mined in Uruguay from the hard volcanic rock.
Amethyst being mined in Uruguay from the hard volcanic rock.


Amethyst is a purple variety of quartz (SiO2) and owes its violet color to natural irradiation, iron impurities, and the presence of trace elements, which result in complex crystal lattice substitutions. It’s considered a semi-precious gemstone, and just two centuries ago was considered to have a value on par with diamonds, sapphires and rubies. The largest, and best known amethyst deposit occur in southern Brazil and Uruguay but many localities around the world produce an amazing variety of amethyst crystals and formations.


Calcite, CaCO3, is a carbonate mineral and the most stable polymorph of calcium carbonate. The other polymorphs are the minerals aragonite and vaterite. Calcite crystals are trigonal-rhombohedral, though actual calcite rhombohedra are rare as natural crystals. However, they show a remarkable variety of habits including acute to obtuse rhombohedra, tabular forms, and prisms. Calcite exhibits several twinning types adding to the variety of observed forms. It may occur as fibrous, granular, lamellar, or compact. Cleavage is usually in three directions parallel to the rhombohedron form.
DETAILS
SPECIES
Quartz var. Amethyst & Calcite
LOCATION
Artigas, Uruguay
SIZE
9.9" tall, 4.7" wide, 12.2" tall on stand
ITEM
#171891