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1 item @ $25.00   30:00

Clinochlore var. delessite

#PD45791

Clinochlore var. delessite

#PD45791
Availability
Sold
Size
9 x 7 x 4 cm - Sm Cabinet 
Formula
Mg6Si4O10(OH)8 (RRUFF)
Locality
Isle Royale, Houghton Co., Michigan, United States

Dark green foliated and platy Clinochlore, variety delessite. It is a phyllosilicate of the chlorite group - basically a mica mineral. It is formerly from the Paul Moore collection with a label matching the numbered specimen. The mineral was named and described by a famous American geologist, William P. Blake, who was the Arizona territorial geologist and connected with the beginnings of the South Dakota tin mining affair. Here's a link to the Mineralogical Record label archives, which gives a bio on Blake. So basically it is a drab specimen with a colorful past.

Clinochlore

Formula
Mg6Si4O10(OH)8 
Crystal System
Monoclinic 
Crystal Habit
Massive - Fibrous, Pseudo Hexagonal, Granular 
Cleavage
Perfect, None, None 
Luster
Vitreous - Pearly 
Color
blackish green, bluish green, white, yellowish green, olive green 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Uneven 
Hardness
2-2.5 

Data courtesy of Webmineral.

Collection
Phillips Collection

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