Mineralpedia Details for Joaquinite-(Ce)
Joaquinite-(Ce)
Named after the Joaquin Ridge near the type locality at the Dallas Gem mine in California, USA. Joaquinite is a rare mineral that occurs in natrolite veins that cut glaucophane schist inclusions within serpentine as well as in fenitized gneiss and alkalic syenite. It can be found in other USA localities, Canada, and Greenland among just a couple other localities.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/joaquinite-(Ce).pdf
- Formula
- NaBa2Fe2+Ti2Ce2(SiO3)8O2(OH)·H2O
- Crystal System
- Monoclinic
- Crystal Habit
- Euhedral Crystals
- Cleavage
- Good, None, None
- Luster
- Vitreous (Glassy)
- Color
- brown, honey yellow, orange
- Class
- Monoclinic - Sphenoidal
- Fracture
- Brittle
- Hardness
- 5-5.5
- WebMineral
- View Joaquinite-(Ce)
- Mindat
- View Joaquinite-(Ce)
Joaquinite-(Ce) from Dallas Gem mine, San Benito Co., California, United States
- Special Info
- Type Locality
I have never seen so many Joaquinites on one specimen. And these are excellent crystals to 1mm. Oh, there is a 1.3cm Neptunite on top but the black background hides it. There is also just a little bit of a partial Benitoite near the outer edge.
Click thumbnail images for larger view.
