A chunk of raw red tourmaline measured 899.1 grams. This stone is regarded as the October birthstone and a healing stone. Tourmaline is produced in pegmatites. These are voids deep under ground that are filled with a rich hot liquid that is rich in different minerals. When the liquids begin to cool, the minerals crystallize and form Tourmaline crystals. Approximately 5.25 in tall. Condition is consistent with a raw gemstone, some sticker residue on underside. Gemstone specimen, collectible minerals specimen, geology , sedimentary rock , limestone with malachite, collectibles, collectible rocks, jewelry making stone, earth minerals, green banded mineral specimen, Home decor and accessories, shelf display Tourmaline, gemstone, precious gem stone, healing crystals, red tourmaline, raw tourmaline, red stone, stone, natural stone, reiki, reiki healing, healing stone. 12