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Vitreous, Pearly
4½ - 5
Specific Gravity:
2.33 - 2.37
Crystal System:
From the Greek for "away from" (ἀπό, apo) and "leaf" (φύλλον, phyllos), in allusion to the way it exfoliates upon heating.
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Physical Properties of ApophylliteHide

Vitreous, Pearly
4½ - 5 on Mohs scale
2.33 - 2.37 g/cm3 (Measured)    2.37 g/cm3 (Calculated)

Optical Data of ApophylliteHide

Uniaxial (+)
RI values:
nω = 1.535 nε = 1.537
Max Birefringence:
δ = 0.002
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:

Crystallography of ApophylliteHide

Crystal System:

Crystallographic forms of ApophylliteHide

Crystal Atlas:
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Apophyllite no.4 - Goldschmidt (1913-1926)
Apophyllite no.5 - Goldschmidt (1913-1926)
Apophyllite no.6 - Goldschmidt (1913-1926)
Apophyllite no.18 - Goldschmidt (1913-1926)
Apophyllite no.51 - Goldschmidt (1913-1926)
Apophyllite no.98 - Goldschmidt (1913-1926)
3d models and HTML5 code kindly provided by

Edge Lines | Miller Indicies | Axes

Opaque | Translucent | Transparent

Along a-axis | Along b-axis | Along c-axis | Start rotation | Stop rotation

Synonyms of ApophylliteHide

Other Language Names for ApophylliteHide

Varieties of ApophylliteHide

ChromocycliteApophyllite showing coloured interference rings when viewed in convergent polarised light - compare with Leucocyclite (black & white rings).

Common AssociatesHide

Associated Minerals Based on Photo Data:
Stilbite464 photos of Apophyllite associated with Stilbite on
Quartz170 photos of Apophyllite associated with Quartz on
Prehnite157 photos of Apophyllite associated with Prehnite on
Calcite156 photos of Apophyllite associated with Calcite on
Heulandite70 photos of Apophyllite associated with Heulandite on
Gyrolite63 photos of Apophyllite associated with Gyrolite on
Analcime58 photos of Apophyllite associated with Analcime on
Scolecite56 photos of Apophyllite associated with Scolecite on
Natrolite55 photos of Apophyllite associated with Natrolite on
Datolite52 photos of Apophyllite associated with Datolite on

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for ApophylliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Dunn, P.J., Rouse, R.C., Norberg, J.A. (1978) Hydroxyapophyllite, a new mineral and a redefinition of the apophyllite group. American Mineralogist: 63: 196-202.
Dunn, P.J., Wilson, W.E. (1978) Nomenclature revisions in the apophyllite group: hydroxyapophyllite apophyllite fluorapophyllite. The Mineralogical Record: 9: 95-98.

Internet Links for ApophylliteHide

Localities for ApophylliteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListShow

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