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Pumice
Pumice

Obsidian
Obsidian



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Pumice
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Obsidian

Properties of Pumice lan Obsidian

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Properties

atose

ukuran gandum

rengat

tilas

porosity

luster

kekuatan compressive

cleavage

kateguhan

tartamtu gravitasi

transparan

Kapadhetan

kapasitas panas tartamtu

resistance

 
6
grained nggoleki
planar
putih, greenish putih utawa abu-abu
Highly keropos
earthy
51.20 n / mm 2
sampurna
3
2.86
opaque
0.25-0.3 g / cm 3
0.87 kj / kg k
impact tahan, meksa tahan
 
5-5.5
-
conchoidal
putih
banget kurang keropos
vitreous
0.15 n / mm 2
-
-
2.6-2.7
tembus
2.6 g / cm 3
0.92 kj / kg k
tahan panas, impact tahan