Birefringence Gallery
peacefulbirth
gentlebirth
birth pains
aerate gainsborough
bbc bodyguard
Viking CompassVikings were known for their prowess in sailing and navigating large stretches of open
mineralsandsomerocks:Olivine in Plane Polarized (left) and Cross Polarized (right) LightThe amount o
fuckyeahmineralogy: A naturally rhombic specimen of calcite (CaCO3). Well-formed calcite like this i
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