Brazilian Agate Slab

Bold, Moody, and One of a Kind

This large Brazilian Agate slab is a striking specimen that commands attention. Featuring a dark, smoky black and gray bullseye formation with a quartz crystal core, this polished geode slice captures both elegance and raw earth energy. The banded patterns radiate from the center like ripples in still water — a natural masterpiece formed deep within volcanic cavities over millions of years.

Perfect for display, crystal grids, grounding decor, or lapidary work.

Specimen Details

• Specimen: Brazilian Agate Slab
• Dimensions: Approximately 4.25" x 4"
• Weight: 136 grams
• Origin: Mined and cut in Brazil

Attributes

• Classic bullseye pattern with quartz crystal center
• Black, charcoal gray, and off-white concentric banding
• Raw, organic outer edge with polished face
• Formed in volcanic cavities from silica-rich solutions
• Mohs hardness: 6.5–7
• Known for stabilizing and grounding energy
• Ideal for display trays, crystal grids, or cutting/lapidary projects

Note: Some photographs were taken while the specimen was wet to enhance its natural colors.