Petr Hykš:
Rutile twinning
Petr Hykš:
Dark green opal (wet)
Petr Hykš:
Dark green opal (wet)
Petr Hykš:
Opal (wet)
Petr Hykš:
Pale blue opal (wet)
Petr Hykš:
Quartz coated with limonite
Petr Hykš:
Quartz coated with limonite
Petr Hykš:
Opal
Petr Hykš:
Opal in quartz coated with chalcedony (wet)
Petr Hykš:
Quartz and hematite coated by grape chalcedony
Petr Hykš:
Quartz coated by hematite
Petr Hykš:
Quartz coated with pale yellow ?limonite/chalcedony
Petr Hykš:
Quartz coated by hematite
Petr Hykš:
Opal & chalcedony
Petr Hykš:
Quartz vein boulder, rotated, detail
Petr Hykš:
Quartz vein boulder, rotated
Petr Hykš:
Quartz vein boulder, detail
Petr Hykš:
Quartz vein boulder
Petr Hykš:
Opal & chalcedony
Petr Hykš:
Rudice-type geode
Petr Hykš:
Rudice-type geode
Petr Hykš:
Rudice-type geode
Petr Hykš:
Rudice-type geode
Petr Hykš:
Rudice-type geode #AStrokeofLuck
Petr Hykš:
Rudice-type geode
Petr Hykš:
Rudice-type geode
Petr Hykš:
Rudice-type geode
Petr Hykš:
Rudice-type geode
Petr Hykš:
Rudice-type geode
Petr Hykš:
Rudice-type geode
