gemstone

Yellow agate beads

Agate, a banded microcrystalline variety of quartz (SiO₂), likely heat-treated or dyed to enhance the yellow color

AI-generated identification · may be incorrect

Rounded, polished beads are translucent yellow with a vitreous luster. Quartz hardness is 6.5–7 Mohs; agate has a cryptocrystalline structure and no visible cleavage; specific gravity is about 2.6.

Identified October 3, 2026More gemstone →

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Physical properties

Rounded, polished beads are translucent yellow with a vitreous luster. Quartz hardness is 6.5–7 Mohs; agate has a cryptocrystalline structure and no visible cleavage; specific gravity is about 2.6.

Formation & geological history

Agate forms as silica-rich fluids fill cavities, commonly in volcanic rocks, and deposit successive layers. Deposits occur worldwide and range in age; the image cannot establish the beads’ source or treatment.

Uses & applications

Used for beads, jewelry, carvings, and ornamental objects; agate is also used for decorative and precision components.

Geological facts

Agate’s characteristic bands may be microscopic or visible; uniform, vivid bead color can result from dyeing or heat treatment.

Field identification & locations

Look for fine curved bands and a waxy-to-glassy polish; these beads show little obvious banding, so identification as agate is uncertain. Common sources include Brazil, Uruguay, India, and Madagascar.