Gorgeous, 11.9" Amethyst Geode with Calcite - Uruguay

This is a stunning deep purple amethyst geode with calcite, that was collected from the famous mines near Artigas, Uruguay. It measures 11.9 x 8.8 x 6.9" and weighs 26.8 lbs. It's filled with small, dark purple amethyst crystals and displays well on a flat surface. The face of the geode has been polished to a glossy finish.

We import our material directly from the mines in Artigas, Uruguay and it is much darker, higher quality material than you normally see for sale.

About Uruguay Amethyst

Though Brazil produces a greater volume of amethyst, the material from the Artigas region of Uruguay is renowned for its exceptional depth of color and superb crystal quality. Uruguayan amethyst typically forms in dense basalt flows and develops into richly saturated, grape-purple crystals that are considered some of the finest in the world. Because we import our specimens directly from the mines, we’re able to offer outstanding prices on everything from dramatic geodes to premium clusters and collector-grade crystal formations.

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


About Calcite Crystals

Calcite crystals are a form of calcium carbonate (CaCO₃) known for their diverse shapes, transparency, and vibrant range of colors. They typically form in rhombohedral, scalenohedral, or prismatic shapes, often with well-defined, sharp edges and glossy surfaces. Calcite crystals are often translucent or transparent, sometimes displaying a double refraction effect where objects viewed through the crystal appear doubled. They can appear in various colors—white, clear, yellow, pink, blue, green, and orange—depending on impurities or trace minerals.

A notable characteristic of calcite is its reaction with weak acids like vinegar, which causes it to effervesce, or fizz, as it releases carbon dioxide. This property makes calcite crystals a key tool in geological identification and studies. Calcite forms in many environments, from sedimentary rocks like limestone and marble to hydrothermal veins.

SOLD
DETAILS
SPECIES
Quartz var. Amethyst & Calcite
LOCATION
Artigas, Uruguay
SIZE
11.9 x 8.8 x 6.9", weighs just under 27 lbs
CATEGORY
SUB CATEGORY
ITEM
#140523