mineral

Banded Agate (Dyed Purple)

Agate (Variety of Chalcedony/Quartz), SiO2

Hardness: 6.5–7 (Mohs scale); Color: Naturally clear, white, or brown but dyed vibrant purple; Luster: Vitreous to waxy; Crystal structure: Trigonal/Microcrystalline; Cleavage: None; Specific Gravity: 2.58–2.64.

Hardness: 6
Color: Naturally clear, white, or brown but dyed vibrant purple
Luster: Vitreous to waxy

Identified April 11, 2026More mineral →

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Physical properties

Formation & geological history

Formed as secondary deposits in hollow cavities of volcanic rocks (amygdales) or sedimentary rocks. Silica-rich fluids precipitate over time in concentric layers. The purple color in this specimen is artificially added via dye through the stone's microscopic pores.

Uses & applications

Used primarily for ornamental purposes, jewelry (pendants, beads), home decor (paperweights, bookends), and as pocket stones for metaphysical or collecting purposes.

Geological facts

Agate is named after the Achates River in Sicily where it was first discovered. While naturally purple stones like Amethyst exist, most vibrant purple banded agates on the market are artificially dyed to enhance their visual appeal.

Field identification & locations

Identify in the field by its distinct concentric banding, waxy texture when polished, and high hardness (will scratch glass). Natural agates usually have more muted tones.

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