Ocean Jasper

Hardness: 6.5-7 on Mohs scale. Color: Highly varied, often includes shades of green, white, cream, pink, brown, red, and yellow, frequently featuring orbicular (spherical) patterns, swirls, or bands. Luster: Vitreous to waxy. Crystal Structure: Cryptocrystalline (microscopic crystals), no visible crystal forms. Cleavage: None, exhibits conchoidal fracture. Specific Gravity: 2.58-2.62.

Ocean Jasper is a form of orbicular jasper, which is itself a variety of chalcedony. It forms as silica-rich water percolates through volcanic rocks, depositing chalcedony and other minerals in concentric patterns. The distinct orbicular patterns are thought to be caused by rhythmic growth during quartz crystallization around a nucleus. Its formation is associated with ancient lava flows along coastlines, hence the "ocean" in its name, though it is not actually formed in the ocean. It was discovered fairly recently in the late 20th century. Its age is generally Tertiary, approximately 20-30 million years old.

Predominantly used in jewelry (beads, cabochons, carved ornaments) due to its unique and attractive patterns and wide range of colors. Also popular for ornamental carvings, polished display pieces, and for collectors of unique mineral specimens. It is sometimes used in lapidary arts.

Ocean Jasper was only recently discovered in 1999 along the coastline of Madagascar, making it one of the newer gemstones on the market. There are several different veins or deposits, each producing slightly different patterns and color combinations, like classic Ocean Jasper (from Marovato) and Ocean Jasper II (from Kabamby). The name 'Ocean Jasper' refers to its discovery location along the ocean and the wave-like, orbicular patterns that resemble aspects of the ocean. It is often associated with properties of tranquility, renewal, and healing in metaphysical beliefs.

In the field, Ocean Jasper is identified by its distinctive orbicular patterns (spheres or 'eyes') and a wide array of colors. It has a smooth, waxy feel when polished. Its hardness (6.5-7) means it can scratch glass. It is exclusively found in specific remote coastal areas of Madagascar, accessible only by boat at low tide, making it geographically unique. For collectors, look for vibrant colors, clear and distinct orbicular patterns, and a good polish. Be aware that some material is dyed or artificially enhanced, so examine the color saturation and pattern authenticity carefully.