Ludwigite
A larger massive sample composed mostly of fibrous radiating black ludwigite. Ludwigite is a relatively uncommon borate of iron and […]
Painit, rubín
A partially pseudomorphed crystal of very rare painite on which gem-quality ruby crystals are secondarily growing.
Szabélyite
White radial aggregates of Szabélyitu up to 8 mm in size embedded in yellow-green Serpentinite. Relatively rare magnesium borate from […]
Londonite, pollucite
Yellow 15 mm large crystal of rare beryllium borate and rare earths along with blue apatite and white pollucite. Londonite […]
Ludwigite
Historical specimen of fibrous aggregates of sticky black borate of magnesia and iron. The specimen dates back to 1918 .
Jeremejevite
A rich blue crystal of the very rare aluminum borate jeremejevite.
Gaudefroyite
Black crystal of the rare borate of Ca and Mn from the type locality. The crystal is 15 mm in […]
Fredrikssonite
Elongated black needles of fredrikssonite – a rare borate of Mg, Mn, and Fe from the type locality, which is […]
Boracite, pyrite
Beautiful light blue crystals of magnesium borate. The largest crystal is 4 mm.
Meyerhofferite
Intergrown crystals of a rare borate.
Hydroboracite
Radial aggregates of rare white hydroboracite up to 1 cm large overgrown with apophyllite crystals.
Inyoite
Specimen of clear inyoite crystals up to 20 mm in size. Inyoit from Panderma, Turkey.