Zircon is brittle and therefore is sensitive to knocks and pressure. However, it has good hardness and durability. The gem has the tendency to wear along facet edges owing to its brittle tenacity, so its use in zircon rings, should be limited to protective style settings or occasional wear jewelry. Most zircon stones are small in size, due to their dense nature, but some rare large stones can be found. Larger stones are excellent for bold designs, such as unique pendants or brooches. Blue zircon is very popular for rings and earrings, and colorless zircon is often used in bridal jewelry as a diamond substitute.