Crystal Morphology and Structure of Quartz

Crystal Morphology and Structure of Quartz

Quartz (Quartz) is a silicon dioxide (SiO₂) stable homogeneous polymorphic variants, belonging to the three-party crystal system (Trigonal System), the crystal form to hexagonal columnar, often accompanied by conical, rhombohedral or double cone symmetry elements.
Quartz crystals of hydrothermal deposits

Quartz crystals of hydrothermal deposits

Quartz crystals from hydrothermal deposits are very important mineral specimens in geology. Quartz is a common mineral with the chemical composition of silicon dioxide (SiO₂), which is widely found in the earth's crust. In hydrothermal deposits, quartz crystals are usually precipitated from silicon-rich hydrothermal solutions under high temperature and high pressure conditions. These crystals can exhibit complex growth textures, such as oscillatory banded textures, mosaic textures, and concentric ring-banded textures. Quartz crystals often contain fluid inclusions, which can provide important information about the formation conditions of the deposit, such as temperature, pressure and fluid composition.
Quartz crystal coated with chalcedony

Quartz crystal coated with chalcedony

Usually refers to the phenomenon where the surface or interior of a quartz crystal contains a layer of chalcedony. It is a microcrystalline quartz, a variant of quartz, characterized by a waxy luster and a semi transparent appearance. Highly popular in gemology and mineralogy due to its unique appearance and aesthetic appeal. It usually has a sharp hexagonal columnar shape, while the jadeite layer may appear in different colors such as blue, green, red, or yellow, which are usually determined by trace impurity elements. Not only does it have scientific research value, but it is also favored among collectors and jewelry designers due to its unique aesthetic features. Can be cut and polished, used as decorations or artworks
Honeycomb quartz

Honeycomb quartz

Also known as honeycomb quartz or honeycomb crystal, it is a quartz mineral with a unique honeycomb like texture. This texture is due to the formation of hexagonal honeycomb like voids or cracks inside quartz crystals during the formation process, which are usually filled with other minerals such as iron oxides or other minerals. The surface usually presents a smooth glass texture, while the honeycomb structure inside gives a unique beauty. The formation is usually related to hydrothermal activity in geological processes, where hydrothermal fluid flows in the cracks of rocks and gradually deposits to form quartz crystals with changes in temperature and pressure. Under suitable geological conditions, it can grow into large crystal clusters.