NATURAL HISTORY MUSEUM, LONDON / SCIENCE PHOTO LIBRARY NATURAL HISTORY MUSEUM, LONDON / SCIENCE PHOTO LIBRARY
Gemstones and light dispersion. Row of five gemstones showing dispersion and light spill as light is shone on them. From left to right, they are: strontium titanate, cubic zirconia, a diamond (carbon), yttrium aluminium garnet (YAG), and synthetic white sapphire.
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