Chalcedony n' Quartz Veins!

Chalcedony is a cryptocrystalline form of silica, which means it's composed of very fine intergrowths of quartz and moganite. These crystals are so small that they can only be seen under high magnification. Chalcedony has a waxy luster and can appear in a variety of colors, often due to impurities or inclusions within the stone. Here are some key points about chalcedony:

Composition: It's primarily made of silica (SiO₂), with quartz and moganite being the two main components.
Varieties: Chalcedony includes several well-known gemstones like agate, onyx, jasper, carnelian, and chrysoprase, each with distinct patterns or colors.
Formation: It typically forms in the cavities of volcanic rocks, where silica-rich solutions deposit over time.
Properties: It has a hardness of 6.5 to 7 on the Mohs scale, making it quite durable. Its toughness and ability to take a high polish make it popular in jewelry and decorative items.
Uses: Besides being used in jewelry, chalcedony has historical significance in tool-making, art, and even as a gemstone for metaphysical purposes.