dioptase उदाहरण वाक्य

Ren?Just Ha�y ( the famed French mineralogist ) in 1797 determined that the enigmatic Altyn-Tyube mineral was new to science and named it dioptase ( Greek, " dia ", " through " and " optos ", " visible " ), alluding to the mineral's two cleavage directions that are visible inside unbroken crystals.