Opal-Jasper mineral associationYour model is disabled. For more details go to Edit properties3D Model
Locality: Brad, Romania
Size: 9.1 x 8.2 x 5.3 cm
Formula: Jasper - SiO2; Opal - SiO2 · nH2O
Description: This specimen is a compact piece of dark red Jasper with brownish Opal. Jasper is generally a microcrystalline variety of chalcedony (SiO2) stained red by iron oxide inclusions (mostly hematite). Opal is amorphous, is not truly a mineral but a mineraloid, and does not occur in any crystals, except when it forms as a pseudomorph after another mineral.
Concept & 3D-modelling by dr. Andrei Ionut APOPEI