DigMyGem Gem encyclopedia

Yellow Agate

Chalcedony & Agate Family

Yellow agate is a descriptive name for yellow banded agate, not a separate mineral species. Agate is fibrous chalcedony arranged in contrasting bands; natural yellow bands commonly owe their color to microscopic goethite or other iron-bearing material.

Identity

Material or variety
Agate (chalcedony)
Scientific or material identity
Agate (banded chalcedony)
Classification
Natural mineral or mineral variety
Composition or formula
SiO₂
Crystal system or structure
Aggregate or composite structure
Geological or manufacturing origin
Forms from silica- or mineral-rich fluids in cavities and fractures.
Mohs hardness
6.5 to 7
Specific gravity
2.58 to 2.64

Origins

USA

Appearance & optical properties

golden-yellow chalcedony with cream concentric bands.

History & discovery

The catalogue name identifies the stone by color rather than defining a separate agate variety. Agate itself has long been recognized by its repeated bands, which usually grow inward along the walls of cavities or settle in straighter, level layers as silica-rich fluids deposit chalcedony.

Uses & care

Common uses
Yellow-banded agate is sliced and polished to reveal its pattern, then made into cabochons, beads, small carvings, and collectible display pieces.
Handling and cleaning
Clean with warm water, mild detergent, and a soft brush. Protect polished surfaces from harder stones, and avoid harsh chemicals or vigorous mechanical cleaning when the agate is fractured or dyed.

Jewellery

5 pieces of Yellow Agate jewellery. Learners earn each one in DigMyGem by learning words; until then it shows as a silhouette.

  • Silhouette of Honeyband Ring

    Honeyband Ring

    Ring

    Bands of honey-coloured agate ring the finger like tree growth rings.

  • Silhouette of Amber Tide Necklace

    Amber Tide Necklace

    Necklace

    A necklace of yellow agate discs that ripple like a tide of amber.

  • Silhouette of Sunwheel Brooch

    Sunwheel Brooch

    Brooch

    A brooch shaped as a sun wheel, its spokes cut from golden agate.

  • Silhouette of Honey Bee Cameo

    Honey Bee Cameo

    Brooch

    An imagined cameo of a bee carved into yellow agate, its honey and cream layers used to give the bee a light body on a golden ground.

  • Silhouette of Honey Agate Chalice

    Honey Agate Chalice

    Jewel

    An imagined chalice with a bowl carved from honey-yellow agate, mounted in gold set with small pearls.

Sources