10 letters · 12 points in Scrabble
noun a mineral that is a complex borosilicate and hydroxide of aluminum containing iron and magnesium and calcium and lithium and sodium; it is usually black but occurs in transparent colored forms that ar
originFrom French tourmaline, ultimately from Sinhalese තෝරමල්ලී (tōramallī, “carnelian”)
Etymology from Wiktionary, CC BY-SA 3.0