Calcite crystals on matte brown matrix Pseudomorph I suspect the very small

I suspect the very small botryoidal peach-colored crystal spotting the specimen (the largest is visible just right of center in image 4) may be the world's smallest rhodochrosite

and some pieces have hollow cores

and covers the surface enough to cause a sheen effect

Approx dimensions: 5 x 3 x 1

The palette is typically warm tones of red

Calcite crystals on matte brown matrix Pseudomorph I suspect the very smallLocale: 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