RT @kaylai: Opal can be important in volcanic eruption processes! At Kawah Ijen, we found feldspar phenocrysts completely replaced with opa…
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RT @kaylai: Opal can be important in volcanic eruption processes! At Kawah Ijen, we found feldspar phenocrysts completely replaced with opa…
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RT @kaylai: Opal can be important in volcanic eruption processes! At Kawah Ijen, we found feldspar phenocrysts completely replaced with opa…
332 followers
RT @kaylai: Opal can be important in volcanic eruption processes! At Kawah Ijen, we found feldspar phenocrysts completely replaced with opa…