Mineralpedia Details for Jonesite
Jonesite
Named after Francis Tucker Jones, a Research Chemical Microscopist of California, USA who was the discoverer of the mineral. Jonesite is a rare mineral that can be found in the United States at its type locality in the Dallas Gem mine in California, in Slovakia at Vechec, and in the Atlantic Ocean along the Mid-Atlantic Ridge. Jonesite is found in fractures and cavities of breccaited greenstone within blueschist. Jonesite fluoresces a dull orange under shot=wave ultraviolet light.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/jonesite.pdf
- Formula
- KBa2Ti2(Si5Al)O18·nH2O
- Crystal System
- Monoclinic
- Crystal Habit
- Bladed, Tabular
- Cleavage
- Distinct, None, None
- Luster
- Vitreous (Glassy)
- Color
- colorless
- Streak
- white
- Class
- Monoclinic - Prismatic
- Fracture
- Irregular
- Hardness
- 3-4
- WebMineral
- View Jonesite
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- View Jonesite
Jonesite from Gem mine, San Benito Co., California, United States
Well-formed divergent group of Jonesite crystals (clear, platy, terimated) to 0.75mm.
Click thumbnail images for larger view.
