Amygdaloidal – Like embedded almonds
  • March 13, 2023

Common examples include: heulandite, subhedral zircon Amygdules or amygdales (/əˈmÉȘÉĄdjuːlz, -deÉȘlz/) form when the vesicles (pores from gas bubbles in lava) of a volcanic rock or other extrusive igneous rock are infilled with a secondary mineral, such as calcite, quartz, chlorite, or one of the zeolites. Amygdules usually…

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