Mineralpedia Details for Volborthite
Volborthite
Named for Alexander Fedorovich von Volborth, the Russian paleontologist who first observed the mineral. Volborthite is an uncommon secondary mineral that is found in oxidized zones of hydrothermal Vanadium-bearing deposits and is associated with brochantite and malachite, among others. Despite its uncommonness, Volborthite can be found in many localities worldwide.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/volborthite.pdf
- Formula
- Cu3V2O7(OH)2ยท2H2O
- Crystal System
- Monoclinic
- Crystal Habit
- Globular, Scaly
- Cleavage
- Perfect, None, None
- Luster
- Vitreous - Pearly
- Color
- brownish yellow, greenish yellow, yellow, yellow green, light brown
- Streak
- light green
- Class
- Monoclinic - Prismatic
- Hardness
- 3
- WebMineral
- View Volborthite
- Mindat
- View Volborthite
Volborthite from Silver Reef mine, Washington Co., Utah, United States
Grass green tiny rosettes of Volborthite to about 0.2mm covering the face.
Grass green rosette like crystal aggregates to about 0.3mm.
Volborthite from Monument #1 mine, Navajo Co., Arizona, United States
Excellent green, thin platey crystals to 0.75 as singles and rosettes across matrix.
Volborthite from Gold Quarry mine, Eureka Co., Nevada, United States
Rich specimen of thin tabular crystals of green Volborthite on yellow groups of Vésigniéite with Azurite and Malachite. Excellent specimen from this mine.
Volborthite from Monument #1 mine, Navajo Co., Arizona, United States
- Special Info
- XRD Confirmed,Raman
Excellent thin plated greenish yellow crystals to 1mm with Malachite. This is somewhat of a different form the other Volborthite in this gallery. Both were tested.
