Geological & Scientific Properties | Peach Scolecite
Peach Scolecite is a variety of scolecite, a member of the zeolite group of minerals. It is known for its peach to pinkish color, which differentiates it from the more commonly white scolecite. Here's an overview of Peach Scolecite's geological and scientific properties:
Chemical Composition and Structure:
- Composition: Scolecite is a hydrated calcium silicate mineral with the chemical formula CaAl₂Si₃O₁₀·3H₂O. The peach color is likely due to trace impurities.
- Crystal System: It crystallizes in the monoclinic system, typically forming slender, prismatic crystals that are often acicular (needle-like) or fibrous.
Physical Properties:
- Color: Peach Scolecite exhibits a range of colors from pale peach to pinkish hues.
- Hardness: It has a Mohs hardness of 5 to 5.5, making it relatively soft.
- Luster: The luster is typically vitreous to silky.
- Transparency: This mineral can be transparent to translucent.
- Cleavage and Fracture: Scolecite has perfect cleavage in one direction and a brittle fracture.
Optical Properties:
- Refractive Index: The refractive index of scolecite is approximately 1.510 to 1.531.
- Birefringence: Scolecite exhibits birefringence due to its monoclinic crystal structure.
Geological Occurrence:
- Formation: Scolecite commonly forms in cavities within basaltic volcanic rocks and is often associated with other zeolite minerals. It can also occur in hydrothermal veins.
- Associated Minerals: Often found with other zeolites, calcite, apophyllite, and prehnite.
Major Deposits:
- While scolecite is found in various locations worldwide, the peach-colored variety is less common. Notable deposits are in India, Iceland, and the United States.
Peach Scolecite is valued for its aesthetic appeal and is used in lapidary arts and crystal healing practices. In the metaphysical community, it is believed to have calming and nurturing properties, although these claims are not supported by scientific evidence. Its unique coloration and delicate crystal formations make it a sought-after specimen among mineral collectors.
