Lake Superior Agate
Rocks and Minerals

Lake Superior Agate

This specimen is a raw, naturally weathered Lake Superior Agate, held in a hand for scale, suggesting a size of approximately 2 to 3 inches in length. The mineral exhibits a smooth, waxy luster characteristic of cryptocrystalline quartz. Its color palette is dominated by deep translucent grays and smoky browns, accented by vibrant iron-oxide staining in shades of burnt orange and rust red. Notable features include subtle banding patterns visible through the depth of the stone and a somewhat botryoidal or nodular surface texture. There are visible fractures and internal crazing, which are natural results of geological pressure and environmental exposure. The exterior shows typical 'pockmarks' or 'eyes' where secondary mineralization occurred. As a natural geological formation, it lacks maker's marks, but its distinct pigmentation and water-worn appearance are classic indicators of stones found in the Great Lakes region. The piece appears to be in its natural state, without professional lapidary polishing, preserving its original geological character and raw aesthetic value.

Estimated Value

$45.00 - $65.00

Basic Information

Category

Rocks and Minerals

Appraised On

December 31, 2025

Estimated Value

$45.00 - $65.00

Item Description

This specimen is a raw, naturally weathered Lake Superior Agate, held in a hand for scale, suggesting a size of approximately 2 to 3 inches in length. The mineral exhibits a smooth, waxy luster characteristic of cryptocrystalline quartz. Its color palette is dominated by deep translucent grays and smoky browns, accented by vibrant iron-oxide staining in shades of burnt orange and rust red. Notable features include subtle banding patterns visible through the depth of the stone and a somewhat botryoidal or nodular surface texture. There are visible fractures and internal crazing, which are natural results of geological pressure and environmental exposure. The exterior shows typical 'pockmarks' or 'eyes' where secondary mineralization occurred. As a natural geological formation, it lacks maker's marks, but its distinct pigmentation and water-worn appearance are classic indicators of stones found in the Great Lakes region. The piece appears to be in its natural state, without professional lapidary polishing, preserving its original geological character and raw aesthetic value.

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