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Rainbow Calsilica

manmade rainbow calsilica stone. A close up photo showing the individual coloured layers

Rainbow calsilica colourful man-made stone introduced in 2002

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Rhodochrosite

rhodochrosite in the Smithsonian Museum of Natural History

Rhodochrosite mined in north east Argentina since the times of the Incas

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Rhodonite

oval shaped polished rhodonite stone in a museum display cabinet

Rhodonite often features black markings caused by manganese oxide

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Rose Quartz

rose quartz mineral on display in the Smithsonian National History Museum

Pink variety of the mineral quartz. Individual crystals have never been found

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Ruby

princess cut ruby gemstone

Red corundum is ruby all others colours are classed as sapphire

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Ruby Zoisite

Ruby zoisite mineral on display in the Smithsonian Museum of Natural History

Ruby zoisite a combination of red corundum and green zoisite

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