This blue agate slice from Sumatra Island, Indonesia displays layered concentric banding in soft smoky blues, stormy greys, and warm caramel tones. The banding forms flowing, landscape-like patterns across the polished face, reflecting slow chalcedony deposition and well-developed rhythmic growth over extended geological time.

Near the center, a subtle druzy crystal pocket introduces fine crystalline texture that contrasts with the surrounding smooth agate surface. The relationship between polished chalcedony and preserved crystal growth enhances visual depth while maintaining the specimen’s organic outline and geological authenticity.

Weight: 148 g (5.22 oz)
Size: 85 × 60 × 23 mm (3.35 × 2.36 × 0.91 in)

A well-balanced agate specimen suited for collectors who value natural color zoning, clear banding structure, and intact druzy crystal features from Indonesian agate localities.