Mineralpedia Details for Mcguinnessite
Mcguinnessite
Named after Albert Leo McGuinness, who was an amateur mineral dealer and collector from California, USA and made large contributions to the science of mineralogy. Mcguinnessite is a rare mineral that occurs in serpentinized peridotite. It can be found in the United States, Mexico, Austria, Morocco, Japan, New Zealand, and a few other localities. Associated minerals include vuagnatite, malachite, azurite, chrysocolla, iron oxides, coalingite, pokrovskite, glaukosphaerite, gaspeite, and jamborite.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/mcguinnessite.pdf
- Formula
- CuMgCO3(OH)2
- Crystal System
- Monoclinic
- Crystal Habit
- Spherical
- Luster
- Vitreous - Silky
- Color
- blue green, green, white
- Class
- Monoclinic - Prismatic
- Fracture
- Brittle
- Hardness
- 2.5
- WebMineral
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- Mindat
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Mcguinnessite from Red Mountain, Mendocino Co., California, United States
Tiny spherules of bluish green Mcguinnessite to less than 0.5mm.
Mcguinnessite from Basic Refractories mine, Gabbs, Nye Co., Nevada, United States
Micro spheroidal crystals about 0.25mm in size.
Mcguinnessite from Cedar Hill quarry, Lancaster Co., Pennsylvania, United States
1mm blue spheroidal crystals with a compact fibrous cross sections.
McGuinnessite from prospect on Chalk Mountain, Churchill Co., Nevada, United States
- Special Info
- XRD Confirmed,EDS Confirmed
Bluish green spheroidal crystals and crusts from a relatively unknown Nevada locality. EDS/XRD
