Lapis lazuli specimen. Polished slab of lapis lazuli from Siberia containing white calcite and some brassy-coloured pyrite. Lapis lazuli (sodium calci

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Lapis lazuli specimen. Polished slab of lapis lazuli from Siberia containing white calcite and some brassy-coloured pyrite. Lapis lazuli (sodium calcium aluminum silicate sulphur sulphate) is a rich blue opaque, semi-precious mineral, with the rich colour due to the sulphur in its composition.

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Size: 3698px × 4725px
Photo credit: © NATURAL HISTORY MUSEUM, LONDON/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 1900s, 1923, 1924, 20th, angiosperm, angiosperms, bearded, biological, biology, botanical, botany, bullock-webster, century, chara, collection, desmacantha, flora, flower, flowering, historical, history, lesser, museum, natural, nature, plant, preserved, pressed, specimen, stonewort