ORKG Shapes

go to ORKG: http://orkg.org/orkg/predicate/P41223

Opal (nm)

Opal is a silica mineral extensively used as a gemstone, a submicrocrystalline variety of cristobalite.

• http://orkg.org/orkg/shapes/orkgc_Contribution
• http://orkg.org/orkg/shapes/orkgc_Resource