Feb 23, 2021
Diopside
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Diopside
Four Rhyolites
“Amphibolite is shiny because hornblende has a strong luster. Arendal, Norway. Width of sample 10 cm. “
Cut and polished Labradorite.
Syenite with quartz and alkali feldspar (plus hornblende, probably).
Skeletal galena.