Quartz (variety chalcedony) - , Mexico - 6.5 x 3.5 x 4.7 centimeters
Mineral: Quartz (variety chalcedony)
Locality: Guanajuato, Mexico
Dimensions: 6.5 x 3.5 x 4.7 centimeters

Description: Red chalcedony covered with very small quartz crystals.