a mineral belonging to the alkali feldspar group
One is that of the Inuit people who claimed it fell from the frozen fire of the Aurora Borealis
These twin crystals are highly valued by mineralogists and collectors due to their unique formation and aesthetic appeal
which rivals that of other well-known opals like Australian Opal
IIIE meteorite that is composed of 6 currently known masses totaling 74 tons
Siderite with Calcite from Dalnegorsk, Russia TF1830 green opal a mineral belonging to theSiderite with Calcite from Dalnegorsk, Russia Approx. Dimensions: 4x2x2. 5 inches Approx. Weight: 168 grams Locality: Nikolaevskiy Mine, Dalnegorsk, Primorskiy Kray, Russia Siderite with calcite specimens from Russia, specifically the renowned Nikolaevskiy Mine in Dalnegorsk, Primorsky Krai, are highly prized for their unique, often spherical, and complex, multi generational crystalline structures. These, mineral specimens from the Nikolaevskiy Mine