Saponite
(Ca0.5,Na)0.33(Mg,Fe2+)3(Si,Al)4O10(OH)2 · 4H2O

     Saponite is fairly rare at MSH.

PHYSICAL CHARACTERISTICS:

Color is usually dark greenish-brown.
Luster is earthy to resinous.
Diaphaneity is transparent to translucent to opaque.
Crystal System is monoclinic; (??).
Crystal Habits include micaceous plates.
Cleavage {001} is perfect.
Fracture is not apparent due to cleavage.
Hardness is 1 - 2.
Specific Gravity is approximately 2.2 g/cm3.
Streak is white.
Associated Minerals include apophyllite series, calcite, pectolite
   and vesuvianite.
Distinguishing Features: Crystal habit.
Origin: Named in 1758 from the Latin sapo, soap, alluding to its
   greasy or soapy feel and appearance.

CLASSIFICATION:

Dana System
# 71.3.1b.3

Strunz Classification
# VIII/H.20-20

REFERENCES:
Dana 8:1489-1490 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

MSH
¤¤¤

PE
--

AP
--

MX
¤¤

SS
--

MC
--

HF
--

BR
--

SX
--

FR
--

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