According to the Madras Tamil Lexicon, the name comes from the Sinhalese word "thoramalli," a group of gemstones found in Sri Lanka.
ອີງຕາມການ Madras Tamil Lexicon, ຊື່ມາຈາກຄໍາ Sinhalese "thoramalli," ກຸ່ມຂອງແກ້ວປະເສີດທີ່ພົບເຫັນຢູ່ໃນສີລັງກາ.