Tiger's Eye

Hardness: 6.5-7 on the Mohs scale. Color: Golden to reddish-brown with characteristic chatoyancy (a silky, luminous streak). Luster: Silky. Crystal Structure: Fibrous, pseudomorphous after crocidolite. It does not have distinct cleavage due to its fibrous nature. Specific Gravity: 2.64-2.71.

Tiger's Eye is a pseudomorph of quartz after the fibrous mineral crocidolite. It forms when quartz slowly replaces the asbestos mineral crocidolite, while still retaining the original fibrous structure. The golden-brown color and chatoyancy are due to the remaining iron oxides within the quartz. It is formed in metamorphic rocks under specific pressure and temperature conditions, often found in banded iron formations. Its geological age varies depending on the specific deposit, but it is typically found in ancient metamorphic terranes.

Primarily used as a gemstone in jewelry, such as beads, cabochons, and carvings, due to its attractive chatoyancy. Its affordability and unique appearance make it popular for various decorative items and ornamental purposes. It is also collected by mineral enthusiasts.

Tiger's Eye gets its name from the way it reflects light, resembling the eye of a tiger. Historically, it was believed to offer protection and bring good luck to the wearer. Roman soldiers carried it for protection in battle. In some cultures, it is associated with courage, integrity, and the ability to focus the mind.

In the field, Tiger's Eye is easily identified by its distinctive golden to reddish-brown color and the prominent chatoyancy, which appears as a shimmering band of light that moves across the surface when turned. It is typically found in massive formations. The most significant deposits are in South Africa and Thailand. Other notable locations include Australia, India, and the USA (California). Collectors look for strong chatoyancy, even color distribution, and minimal inclusions. Distinguishing it from similar chatoyant stones like hawk's eye (blue-gray) or cat's eye chrysoberyl (stronger, singular band) is key.