calcite

Extinct Marine Arthropods Trilobite Had Hard Crystal Eyes; Fossilized Lenses Reveal They Were Made of Calcite

Medicine & Technology Jul 12, 2023

Trilobites had complex eyes like insects with lenses made of calcite. Read on to know the details.

Some Starfish Have Diamondlike Bone Structure To Compensate For Its Intrinsic Weakness

Feb 11, 2022

Starfish or sea star is made of brittle, stonelike minerals, but new research found that they derive strength from an unusual internal structure to compensate for their intrinsic weakness.

calcite

Extinct Marine Arthropods Trilobite Had Hard Crystal Eyes; Fossilized Lenses Reveal They Were Made of Calcite

Some Starfish Have Diamondlike Bone Structure To Compensate For Its Intrinsic Weakness

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