50.0 MB (1.7 MB compressed)
5094 x 3430 pixels
43.2 x 29.0 cm ⏐ 17.0 x 11.4 in (300dpi)
NATURAL HISTORY MUSEUM, LONDON / SCIENCE PHOTO LIBRARY NATURAL HISTORY MUSEUM, LONDON / SCIENCE PHOTO LIBRARY
A faceted sapphire gemstone, known as Oriental Amethyst' due to its purple colour, set in a ring. Close examination shows that the sapphire is actually blue and red.
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