One-of-a-kind piece! These are earrings made with black aventurine quartz from India. Inclusions are present within the quartz, and they sparkle when viewed from different angles. This item has been authenticated by a separate supplier and confirmed to be "aventurine quartz." The inclusions are likely due to graphite-based carbon. Black Aventurine: Approximately 10 x 30mm 14kgf wire used Earrings: 1600 yen Earring posts: Medical-grade surgical stainless steel ⭐️14kgf earring posts can be used, but the price will vary depending on the hook. Please contact me before purchasing. ☺︎Earrings can be changed to resin, hoop, or screw-back style. Please consult with me. Screw-back earrings are made of medical-grade stainless steel. ☺︎Black Aventurine It is said to be a stone of "mental stability," and has the effect of healing stress with its soft vibrations. It balances the mind and body and brings harmony to relationships, so it is recommended for those who want to smooth out their relationships. It is also said to enhance sound judgment, so it should support those aiming for business success and leadership.⭐︎ ☆What is 14kgf?☆ It is a gold-filled material where 1/20th of the total weight is 14k gold. It is pressure-bonded with a 14k layer about 100 times thicker than plating, and has a luxurious feel and shine that is different from plated products. It is unlikely to peel off like plating. If used with care, it is a material that can be used in the same way as 10k or 18k gold.