Silica · Opal

Fire Opal

Fire opal is the warm yellow-orange-red body-coloured opal of Mexico and Ethiopia, transparent enough to facet, sometimes with play-of-colour.

Colour
orange

Transparency
Variable

RI
1.370–1.430

SG
1.98–2.23

Mohs
5.0–6.5

Birthstone
October

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