Scolecite and Apophyllite

ID	10
Mineral	Scolecite Apophyllite
Location	Nashik District - Maharashtra - India
Fluorescence	LW-UV: close SW-UV: close
Mindat.org	View Scolecite information at mindat.org View Apophyllite information at mindat.org

ID	3594
Long ID	1:1:3594:7
Formula	`Ca(Si₃Al₂)O₁₀ · 3H₂O`
IMA Status	0 1
Other Occurrences	Cavities in basalts; Alpine clefts.
Discovery Year	1813
Diapheny	Transparent,Translucent
Cleavage	Perfect on the {110} and {1_10}
Tenacity	brittle
Colour	colorless, white , pink, salmon, red, green
Hardness (min)	5.0
Hardness (max)	5.5
About the name	From the Greek, σκώληξ (skolex) = 'worm' in reference to the mineral's reaction to the blowpipe flame.
Streak	white
Crystal System	Monoclinic
Cleavage Type	Perfect
Fracture type	Irregular/Uneven
Morphology	Crystals are slender prismatic
Twinning	On {100}, twin axis [001], contact or penetration twins
UV	May be yellow to brown in LW and SW.
Comment Luster	Silky when fibrous
shortcode_ima	Slc
Group	Natrolite Subgroup

ID	1989
Long ID	1:1:1989:3
Formula	`KCa₄Si₈O₂₀(OH,F) · 8H₂O`
IMA Status	0
Discovery Year	1978
Diapheny	Transparent,Translucent,Opaque
Cleavage	{001}
Tenacity	brittle
Colour	Colorless to white; may be pink, light green, or light yellow.
Hardness (min)	4.0
Hardness (max)	5.0
About the name	Apophyllite was named in 1806 by Rene Just Haüy from the Greek for "away from" (ἀπό, apo) and "leaf" (φύλλον, phyllos), in allusion to the way it exfoliates upon heating. Chemical variants were recognized by Pete J. Dunn, Roland C. Rouse, and Julie A. Norberg in 1978.
Streak	white
Crystal System	Tetragonal
Cleavage Type	Perfect
Fracture type	Irregular/Uneven
Comment Luster	Vitreous on {100} and pearly on {001}
shortcode_ima	Hapo-K
Group	Apophyllite Group

Price: € 10

Dimensions: Not registered

Weight: Not registered

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