Chalcedony

ChalcedonyA silicone based mineral closely related to quartz and agate, Chalcedony has a unique crystalline structure that gives it an enormously variable appearance. This mineral forms in a similar fashion to agates and geodes but due to heat and pressure at the time of formation results in a distinct look and almost silky texture. Chalcedony can be found in a range of colors but most often occurs in semitransparent or white. It has a long archaeological

often including scale and other soft tissue traces against a high contrast laminated limestone slab

These large

textures and patterns

delicate crystalline formations

such as agates

Beautifully preserved on slabs of flat shale

with color intensity usually deepest at the termination or tip of each crystal

It is found in many sites across the world

silky and lustrous texture of these fibrous Malachite specimens combined with the incredibly rich color make them deservedly popular among collectors

Approx size of fossil - 4

highly variable Chalcedony spheres or roses are almost geode-like in appearance and one can clearly see the process of geode or agate formation in progress in each specimen

often radiating outward from a central axis