Formula: MgSiO2(OH)2·H2O
Origin of name: Named after Lavino Spada de Medici (1801-1863), Italian politician and student of minerals
Crystal system: amorphous
Crystal class:
Twinning:
Unit cell:
Colour: Colourless, creame, pinkish
Diaphaneity: Translucent to subtranslucent
Luster: Vitreous dull
Habit: Massive - Uniformly indistinguishable crystals forming large masses, amorphous.
Hardness: 2.5
Specific gravity: 2.2
Cleavage: None
Tenacity:
Streak: White
Synonyms/varieties:
Comments: probably not a valid mineral species
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