Made in Japan. K18 product. This is a pendant top featuring a rare natural stone, a Santa Maria Aquamarine in an oval cut. Santa Maria Aquamarine is a special stone that has a deeper blue brilliance than regular aquamarine. Its vivid blue color boasts a beauty as if it has captured the clear sea. The name comes from its discovery in the Santa Maria mine in Brazil, and its rarity and charm attract many people. Stamped K18. Stone size: Approximately 3 x 4mm Material: K18 yellow gold, Santa Maria Aquamarine 0.10ct The bale is an oval shape with an inner diameter of approximately 3mm. 2