allophane

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al·lo·phane

A0215300 (ăl′ə-fān′)n. An amorphous, translucent, variously colored mineral, essentially hydrous aluminum silicate.
[From Greek allophanēs, appearing otherwise : allos, other; see allo- + phainesthai, phan-, to appear, passive of phainein, to show; see bhā- in Indo-European roots.]

allophane

(ˈæləˌfeɪn) n (Minerals) a variously coloured amorphous mineral consisting of hydrated aluminium silicate and occurring in cracks in some sedimentary rocks[C19: from Greek allophanēs appearing differently, from allo- + phainesthai to appear]

al•lo•phane

(ˈæl əˌfeɪn)

n. a clay mineral, an amorphous hydrous silicate of aluminum, occurring in blue, green, or yellow, resinous to earthy masses. [1835–45; < Greek allophanḗs appearing otherwie]