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which is a type of quartz
bubble-like forms stacked together
₅)Al₆(BO₃)₃Si₆O₁₈(OH)₄
Ludwigite is a rare borate mineral that typically appears as dark green to blackish-green crystals
Opal - Mineral Specimen emotional stability which is a type ofMined from: Coober Pedy, South Australia, Australia Description: This Australian opal is shown in rough form, still partially embedded in its host rock, with a mix of pale blue grey translucent silica and earthy red brown ironstone staining. The surface shows natural weathering and pitting, with areas of exposed opal displaying a waxy to slightly glassy luster. Subtle internal color shifts are visible in the cleaner sections, with faint hints of blue
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