Transparent and translucent Opals appear orange in transmitted light and bluish when viewed perpendicularly to the transmitted light.
This phenomenon is known as opalescence.
www.edelsteine.atTransparente bis transluzente erscheinen im Durchlicht oft orange und bläulich bei Betrachtung normal zum Durchlicht.
Dieses Phänomen wird Opaleszenz genannt Im Edelstein- u.
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