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Apophyllite-(KOH): KCa4Si8O20(OH,F)·8(H2O) Apophyllite: KCa4(Si4O10)2F·8(H2O) Stilbite-Ca: NaCa4[Al8Si28O72]·n(H2O) (n=28-32)
Comments: 3 cm. pink-colored rosette of stilbite and clear "apophyllite" (probably hydroxyapophyllite) in an amygdaloidal cavity.
Location: Aurangabad District, Jalgaon, India.
Scale: Specimen size 6 cm.
© Dave Barthelmy
Apophyllite-(KOH): KCa4Si8O20(OH,F)·8(H2O) Apophyllite: KCa4(Si4O10)2F·8(H2O)
Comments: Crystal cluster of tabular hydroxyapophyllite.
Location: Wessels Mine, Kalahari Manganese Field, Northern Cape Province, South Africa.
Scale: 2.5 x 2.3 cm.
© John Veevaert