3.7" Pyrope, Forsterite, Diopside & Omphacite Slice - Norway
This is a gorgeous association of pyrope garnets, forsterite, diopside and omphacite that was collected from Gusdal, Norway (likely from the Gusdal Olivine Pit). The pyrope garnets are red-magenta in color and are peppered throughout a green matrix that's composed of forsterite, diopside and omphacite. This mineral association is also known as pyrope-olivine-websterite. This specimen has been cut and varnished to a matte finish.
Diopside is a pyroxene mineral with the chemical formula MgCaSi₂O₆. It is often found as small green crystals within metamorphic and igneous rocks, though it can vary in color including yellow, brown and black crystals. It is an important indicator rock when searching for deep-source volcanic pipes that may or may not contain diamonds. Geologists that are searching for these pipes often look for diopside crystal fragments since they form in nearly the same atmospheric conditions and locations as diamonds. Diopside crystals with deep green coloration are known as chrome diopside.