Rudno, Kraków, Małopolskie, Poland

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Heulandite
	Rudno, Kraków, Małopolskie, Poland Heulandite crystals up to 2 mm in lenght on surface of vacuole in basalt. Photographer and collection Eligiusz Szełęg.
© Elek Szełęg	Photo ID: 81494 View Count: 163
Quartz (Var: Amethyst) : SiO₂
	Rudno, Kraków, Małopolskie, Poland Aggregate of quartz (var. amethyst). Overall size 4x4x2 cm. Photographer and collection Eligiusz Szełęg.
© E. Szełęg	Photo ID: 94514 View Count: 192
Sepiolite : Mg₄Si₆O₁₅(OH)₂·6H₂O
	Rudno, Kraków, Małopolskie, Poland Mass of sepiolite on the basalt. Overall size 12x18x6 cm. Photographer and collection Eligiusz Szełęg.
© E. Szełęg	Photo ID: 95284 View Count: 264

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Rudno, Kraków, Małopolskie, Poland

Heulandite

Quartz (Var: Amethyst) : SiO2

Sepiolite : Mg4Si6O15(OH)2·6H2O

Quartz (Var: Amethyst) : SiO₂

Sepiolite : Mg₄Si₆O₁₅(OH)₂·6H₂O