Mushroom Rhyolite - Rough


Price per: Gram
Price:
Sale price$0.15 CAD
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Specifications

  • Mohs Hardness 6.5
  • Mineral Families Silicates
  • UV Reactive Non Reactive
  • Treatments Natural/None

Description

Locality: Arizona, U.S.A.

Description: Mushroom Rhyolite is found in several areas northwest of Phoenix, Arizona. The rock gets its name from the repeating gray pattern that sometimes looks like a mass of growing mushrooms. Due to the high silica content, rhyolite lava is very viscous. Some portions contain a reddish halo which surrounds the outside of the gray massive "thundereggs" providing a colorful contrast on the rock. When cut in half the mushroom looks like a burst within the rock formation.

Traditionally, mushroom rhyolite has been associated with harmony and creativity.

Chemical Composition: SiO2 + K2O + 70-75% silicon dioxide + Potassium Oxide

Grade: Lapidary Grade
Appearance: Opaque
Inclusions: Fractures

Approximate Size of 1 pc: 7cm x 6cm x 6cm 
Approximate Weight of 1 pc: 420g

Rough is rough. We do our best to grade and describe pieces in the lot, but ultimately, they all differ.

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