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Polylithionite On Elbaite

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PJM77876

Polylithionite On Elbaite

Description Tabs

Description
Locality: 
Darrah I Pech, Chapa Dara District, Kunar Province, Afghanistan
Size Range: 
Small cabinet (7-10 cm)
Size: 
1.5 × 7 × 2.8 cm
Description

Pearly pale lilac books of polyliyhionite almost completely cover one side of this specimen, the matrix for the polylithionite is composed of about 10 parallel growing elbaite crystal of a soft pink colour. The polylithionite just seems to disappear into the matrix even though the individual books are upto approx. 1 cm across.

Mineral Data
What's on the rock

Polylithionite

Formula: 
KLi2Al(Si4O10)(F,OH)2
Strunz: 
9.EC.20
Hardness: 
2.0 - 3.0
Type Locality: 
Kangerluarsuk Fjord (Kangerdluarssuq Fjord), Ilímaussaq complex, Narsaq, Kujalleq, Greenland

Elbaite

Formula: 
Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Strunz: 
9.CK.05
Hardness: 
7.5
Streak: 
White
Type Locality: 
Fonte del Prete, San Piero in Campo, Campo nell'Elba, Elba Island, Livorno Province, Tuscany, Italy...
Earthstones Australia

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