A substantial single ruby corundum crystal measuring 19.2x8.8mm, presenting in its natural, opaque mineral form. The exterior carries the brownish-orange iron oxide patina common to Madagascar ruby rough straight from the deposit, with zones of the characteristic red corundum color visible where the surface meets the crystal's natural faces. The elongated form reflects the trigonal crystal system of corundum, and at 20 carats this is a sizeable individual specimen with presence and weight. Madagascar is the world's primary commercial source of natural ruby, and single crystals reaching 20 carats in rough weight represent a small part of the material extracted - most production is cut or processed at smaller sizes. This piece is suited for a dedicated mineral specimen collection, lapidary work, or as a display-quality raw ruby for anyone who values the stone in its completely unprocessed, natural state. Untreated, with naturally occurring UV fluorescence typical of Malagasy ruby corundum. Stone type: Natural Ruby Weight: 20ct Size: 19.2x8.8mm Color: Red Cut: Rough crystal Clarity: Opaque Treatment: Untreated Origin: Madagascar Hardness: 9 Natural ruby corundum, July birthstone - sold loose.
