Pumpellyite, Epidote, Microcline and Clinochlore

ID	406
Mineral	Pumpellyite Epidote Microcline Clinochlore
Location	Los Arenales quarry - Toras - Castello - Spain
Fluorescence	LW-UV: close SW-UV: close
Mindat.org	View Pumpellyite information at mindat.org View Epidote information at mindat.org View Microcline information at mindat.org View Clinochlore information at mindat.org

ID	3307
Long ID	1:1:3307:3
Formula	`Ca₂Fe²⁺Al₂(Si₂O₇)(SiO₄)(OH,O)₂ · H₂O`
IMA Status	0
Diapheny	Translucent
Colour	Greenish black
Hardness (min)	5.0
Hardness (max)	5.0
About the name	Named for its relationship to the the members of the pumpellyite group. The suffix was added in 1973 during a redefinition of the species. Raphael Pumpelly [September 8, 1837 Owego, New York, USA – August 10, 1923 Newport, Rhode Island, USA] was an active mining consultant and was professor of Mining Science at Harvard University. He was appointed director of the New England branch of the United States Geological Survey in 1884.
Crystal System	Monoclinic
Morphology	Rosettes and spherulites in stringers.
shortcode_ima	Pmp-Fe2+
Group	Pumpellyite Subgroup

ID	1389
Long ID	1:1:1389:1
Formula	`Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)`
IMA Status	0 1
Other Occurrences	Regional and contact metamorphic rocks. Saussuritisation (alteration of plagioclase).
Discovery Year	1801
Diapheny	Transparent,Translucent,Opaque
Cleavage	Perfect on {001}, imperfect on {100}
Tenacity	brittle
Colour	Yellowish-green, green, brownish-green, black
Hardness (min)	6.0
Hardness (max)	6.0
Lustre	Vitreous
About the name	Named in 1801 by Rene Just Haüy from the Greek επιδοσιζ ("epidosis"), meaning "increase", in allusion to the crystal characteristic of one longer side at the base of the prism.
Streak	Colourless
Crystal System	Monoclinic
Cleavage Type	Perfect
Fracture type	Irregular/Uneven
Morphology	Crystals prismatic to 35 cm, also stubby, rarely tabular or pseudo-octahedral. Fibrous, coarse to finely granular, massive. Prismatic crystals may show a pseudo-hexagonal cross-section.
Twinning	On {100}, contact, lamellar, common.
shortcode_ima	Ep
Group	Epidote Group

ID	2704
Long ID	1:1:2704:1
Formula	`K(AlSi₃O₈)`
IMA Status	0 1
Other Occurrences	Plutonic felsic rocks, pegmatites, high-grade metamorphic veins, hydrothermal veins
Industrial	Ceramics
Discovery Year	1830
Diapheny	Transparent,Translucent
Cleavage	on [001], good on [010]
Tenacity	brittle
Colour	White, grey, greyish yellow, yellowish, tan, salmon-pink, bluish green, green.
Hardness (min)	6.0
Hardness (max)	6.5
Luminescence	None
Lustre	Vitreous
About the name	Name given in 1830 by Johann Friedrich August Breithaupt to a reddish to brownish feldspar from Arendal, Norway, and a feldspar with bluish schiller from Stavern (formerly Fredrichsvärn), Norway, from the Greek μικρός (little) and κλινειν (to incline), in allusion to the small departure from monoclinic symmetry.
Streak	White
Crystal System	Triclinic
Cleavage Type	Perfect
Fracture type	Irregular/Uneven
Morphology	Prismatic crystals (to 50 m and 13,500 t), granular, massive. Commonly forms perthitic intergrowths.
Twinning	Carlsbad, Baveno, Manebach, polysynthetic on albite and pericline laws.
Comment Luster	Pearly on cleavage
shortcode_ima	Mcc

ID	1016
Long ID	1:1:1016:6
Entry type	5
Description	A group of mostly monoclinic (also triclinic or orthorhombic) micaceous phyllosilicate minerals with a structure consisting of T-O-T layers with two layers having their silicate tetrahedral apices pointing towards each other, separated by an interlayer...
Hardness (min)	2.0
Hardness (max)	2.5
Streak	Colorless
Crystal System	Monoclinic
shortcode_ima	Chl

Price: € 20

Dimensions: Not registered

Weight: 21 g

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