open 10 am - 7 pm
laboratory is closed
Publication
Why are opals called white, black, brown ("chocolate", "coffee") or fire? It's all about the base color of the stone.
Ussingite is a rare jewelry and ornamental stone with a pale pink color of low saturation and is most often found in the form of confluent fine or coarse-grained masses in pegmatites of alkaline intrusive massifs.
The world of volost stones is very diverse, and this is despite the fact that the presence of contrasting hair-like inclusions in a stone rarely increases its decorative properties.
The mineral sillimanite is quite widespread in nature and is mined for the purpose of obtaining high-quality refractories from it later and using it in the production of ceramic products.
The name of the effect is derived from the ancient Greek "άστήρ" - "star".
