Aragonite Star Cluster Value Guide

The Aragonite Star Cluster is a highly prized carbonate mineral formation, specifically sought after for its unique 'sputnik' or starburst geometry. Originating from Morocco, these natural calcium carbonate crystals represent a distinct polymorph first identified in 1788, making them a staple for geological collectors.

What affects the value of Aragonite Star Cluster?

• The overall symmetry and completeness of the 'starburst' formation significantly impact the $50-$70 price range.
• Specimen size and the lack of broken or chipped crystal points increase market desirability.
• Color saturation, specifically the richness of the earthy red and brown tones, affects collector value.
• The presence of a matrix or the specimen being a clean, freestanding cluster can dictate the final valuation.

How to Identify Aragonite Star Cluster?

• Look for the characteristic 'sputnik' or starburst shape consisting of radiating hexagonal prisms.
• Verify the origin as Morocco, which is the primary source for these specific reddish-brown twinned crystal clusters.
• Check for a vitreous to resinous luster on the surface of the crystal faces.
• Confirm the mineral hardness is between 3.5 and 4 on the Mohs scale, consistent with aragonite.

History of Aragonite Star Cluster

Aragonite is a carbonate mineral, one of the two common naturally occurring crystal forms of calcium carbonate, the other form being calcite. It was first described in 1788 by Abraham Gottlob Werner after it was found in Aragon, Spain. Aragonite often forms in 'starburst' or 'sputnik' shapes, which are highly prized by collectors. It is commonly found in hot springs, caves, and other geological environments with specific conditions for its formation.