Gilson Lab Opals - Black Triangle Coin - 3mm (0) No Reviews yet Pinit SKU: GLOTRIANGLECOIN_BLACK_3MM $2.00 / Piece Quantity discounts available PiecePrice $2.50 / Each Save 20% Quantity -+ Add to Cart Details Our 3mm triangle coin opals are are flat & polished on both side and the edges are rounded and polished. These stones are perfect for geometric patter... DetailsApplyDetailsOur 3mm triangle coin opals are are flat & polished on both side and the edges are rounded and polished. These stones are perfect for geometric patterns.Sold by the piece.See MoreSee Less Reviews 0 ApplyRatings & ReviewsNo reviews availableBe the first to Write a Review