Mineral Exhibition at the Science Library (Realfagbiblioteket) at NTNU
Crocoite
[ PbCrO4 ]
Adelaide Mine, Dundas, Tasmania
Australia
Uvarovite
[ Ca3Cr2(SiO4)3 ]
Saranovskii Mine, Sarany, Perm Krai
Russia
Goethite – Iridescent
[ α-Fe3+O(OH) ]
Filón Sur, Tharsis, Huelva, Andalusia
Spain
Amethyst – Brandberg
[ SiO2 ]
Brandberg, Daures, Erongo Region
Namibia
Cavansite
[ Ca(VO)Si4O10 • 4(H2O) ]
Wagholi, Pune District, Maharashtra
India
Hessonite – Garnet
[ Ca3Al2(SiO4)3 ]
Jeffrey Mine, Val-des-Sources, Québec
Canada
Exhibition at NTNU
From February 10th, 2025 you may enjoy colorful minerals from all over the world in an exhibition in the Science Library (Realfagbiblioteket) at Realfagbygget, Gløshaugen, NTNU
Find your way to Realfagbiblioteket
Cavansite on Stilbite
Wagholi Quarries, Pune District, Maharashtra in India
Cavansite, named for its chemical composition of calcium vanadium silicate, is a deep blue hydrous calcium vanadium phyllosilicate mineral, occurring as a secondary mineral in basaltic and andesitic rocks along with a variety of zeolite minerals. Its blue coloring comes from vanadium, a metal ion.
Discovered in 1967 in Malheur County, Oregon, cavansite is a relatively rare mineral. It is polymorphic with the even rarer mineral, pentagonite. It is most frequently found in the Wagholi Quarries in Pune district, India.
Discover the world of minerals
Treasures from all over the world including fluorites, dioptase, cavansite, thulite crystals, emeralds, topaz and ruby specimens.
All continents are represented with minerals.
Several specimens are of the highest quality for the species.