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Description

Calcite crystals on matte brown matrixLocale: Santa Eulalia, Chihuahua, Mexico Approx dimensions: 4. 5 x 2. 25 x . 75" Approx weight: 107g This specimen from Santa Eulalia has modified rhombohedral calcite crystals on a brown iron oxide matrix. Ripples and flow patterns indicate water was involved in the deposition of the brown sandy textured layered crust, which appears matte but glitters under direct light. The large calcite crystals are heavily included with hematite (iron oxides) and

Approx size: 1–2

The aquamarine is perched atop irregular opaque white mineral on the specimen

but have a relatively dull luster (from what I've observed

UV reactivity Many pseudo-stromatolites from Morocco have faint to moderate white fluorescence and light yellow-green phosphorescence under 365 nm UV light

Sure you could make your own for free

These sandstone arches mimic the grand arches of Utah’s national parks

composed of multiple spherical lumps with a pair at the base and two stacked above

Paired with hyalite

with the lower banding fainter

like seen on the larger point

and this one is the mother lode

This is caused by natural etching just like trigons in diamonds

Exchange/Return Notes