Aragonite and calcite with botryoidal side

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Description

Aragonite and calcite with botryoidal sideLocale: Sidi Ayed, Fs Mekns Region, Morocco Approx dimensions: 2. 25 x 2 x 1. 5" Approx size: 185g Calcite and aragonite are polymorphs of one another, meaning that the same chemical composition (calcium carbonate) has crystallized into different crystal structures (trigonal and orthorhombic, respectively). Calcite and aragonite often grow together, and the two minerals are also frequent paramorphs of one anothera pseudomorph of the same chemical

The growth changes near the tip and the orange chalcedony shows through better

Approx weight: 42g

Approx weight: 112g

UV reactivity The white calcite fluoresces moderately well under 365 nm UV light

These quartz points are from HuangGangLiang

glowing a peachy red

but it's still one of my favorites due to the exquisite details

This specimen features hydroxyapophyllite crystals with lizardite and calcite on matrix

Looking closely

crystalline)

This would make a great display piece

Sputnik aragonite grows clusters of pseudo-hexagonal crystals radiating out from a central point