of Australia used to be an inland sea. Miners now unearth opalized fossils from
its hot dry deserts.
fossils include vegetation or wood from Boulder Fields and opalized clam shells
from Coober Pedy.
fossils also include sea shells, teeth, and even opalised belemnites (squid).
Opalised shells with good colour and small amounts of potch are hard to find,
and many are worth more if left natural and unpolished. Among the rarest are
opalized pineapple, found only in White Cliffs Opal Fields.
collectors desire opalized fossils for their private collections.