Business flourished in precious stones such as diamonds, lapis lazuli, onyx, topaz, carbuncles and emeralds. Tiling stone is typically marble, onyx, granite or slate. He worked with bronze, marble, ivory, onyx, gold, alabaster and other precious materials. Mining produces calcite, marble, calcium oxide, onyx, and lime. Its external walls were made of emerald onyx. Interior leather was available in Onyx or Silver. The Alcantara seat inserts were silver (on Onyx leather). Khadija gave her a wedding present of an onyx necklace. Zainab sent the money for his ransom, including the onyx necklace. They decided to name the band after the onyx stone. Styles turned heavier and more somber, using materials like black enamel, jet, and black onyx. The majority of carved items sold as "onyx" today are this carbonate material. Most "black onyx" on the market is artificially colored. Cameo technique exploits the bands of color in onyx and other varieties. Her symbol is a small stylized mask of onyx.