ʻO ka Agate kahi ʻano mineral chalcedony, i hui pinepine ʻia me ka opal a me ka cryptocrystalline quartz banded block, ka paʻakikī 6.5-7 degere, ka umekaumaha kikoʻī 2.65, he hierarchical ke kala.Loaʻa ka translucency a i ʻole ka opacity.