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South Dakota Prairie Agate- Large

South Dakota Prairie Agate- Large


Here is an old favorite back here at the Rock Shed, crushed large Prairie Agate / Jasper mix. These larger rocks are in varying sizes from 1 1/4″ to 2+”. This South Dakota agate is mostly pastel colors ranging from red to rose and beige to yellow with other accenting colors and some cool banding. These rocks are one-of-a-kind beauties from the plains of South Dakota. They polish nice and make pretty tumbled stones.

MOHS hardness scale of  6.5-7

  • Please note the second photo we photographed the stones wet to show the color and banding of the material.


Agates mostly occur as nodules in volcanic rocks or waters containing silica in solution possibly derived from the decomposition of silicates in the lava. The siliceous matter is deposited in regular layers resulting in the banded or striped formation.

Additional information

Bag Size

1 Lb Large Prairie Agate, 2 Lbs Large Prairie Agate, 3 Lbs Large Prairie Agate, 5 Lbs Large Prairie Agate

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515 1st Street
Keystone, SD 57751

Order: 1-866-354-0894
Information: 605-666-4813

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