Mila | Fragment of opal pineapple @george94122 | Uploaded August 2024 | Updated October 2024, 5 hours ago.
Opal ‘pineapples’ with their distinctive radiating pointed forms, are only found at the White Cliffs opal field.
They are rare double pseudomorphs. They started as Ikaite crystals, which only grow under very cold, glacial conditions and then rapidly changed to waterless calcite, when the temperature rose. In this specimen calcite was later replaced by opal.
Opal ‘pineapples’ with their distinctive radiating pointed forms, are only found at the White Cliffs opal field.
They are rare double pseudomorphs. They started as Ikaite crystals, which only grow under very cold, glacial conditions and then rapidly changed to waterless calcite, when the temperature rose. In this specimen calcite was later replaced by opal.
