Specifications Average Dimensions: 7-10cm Hardness: 6.5-7 Composition: Silicon Dioxide Formula: SiO₂ Origin: Brazil Colour: Green / White Colours, shapes and sizes vary...
Full details
Specifications Average size: 8-10cm Hardness: 7 Composition: Silicon Dioxide Formula: SiO2 Origin: Brazil Colour: Black Colours, shapes and sizes vary, due to...
Full details
Specifications Average Dimensions: 7-10cm Hardness: 6.5-7 Composition: Silicon Dioxide Formula: SiO₂ Origin: Botswana Colour: Grey, Brown Colours, shapes and sizes vary due to the...
Full details
Specifications Average Dimensions: 8-10cm Hardness: 5.5-6 Composition: Feldspathoid Formula: Na₈Al₆Si₆O₂₄ Cl₂ Origin: Brazil Colour: Blue, White Colours, shapes and sizes vary due to...
Full details
Specifications Average Dimension: 5-8cm Hardness: 5-6 Composition: Silicon Dioxide Formula: SiO2 Origin: Mexico (Formed in volcanic areas) Colour: Black with grey spots...
Full details
Specifications Average Dimensions: 7-10cm Hardness: 7 Composition: Silicon Dioxide Formula: SiO₂ Origin: South Africa Colour: Brown / Golden / Black Colours, shapes...
Full details