Rock Tumbler Gem Refill Kit Yellowstone Montana Black Dendrite Agate Rough 8 oz

Rock Tumbler Gem Refill Kit Yellowstone Montana Black Dendrite Agate Rough 8 oz. Great For cabbing too! It is generally believed that Montana agates were formed as the result of volcanic activity in the Yellowstone Park area millions of years ago which deposited a tremendous amount of silica-rich ash .over a wide area.One of the most attractive features of Montana agate is the colored inclusions which are made up of minerals (such as iron and manganese). Some of the most beautiful Montana agates contain dendrites or tree-like plumes of mineral inclusions.Montana agates are found over a broad area along the Yellowstone River valley and adjacent plateau areas from Emigrant MT to the North Dakota border.The finest Montana agate has a clear matrix with well-defined orange-red and black inclusions that form bands specks trees or other shapes. Your 8 oz.(1/2 lb) bag of randomly chosen Yellowstone agates will average 3-4 large pieces. *choking hazard-mature-themed supervision recommended. Refer to original rock tumbler instructions for processing. Another superior rock-tumbler product from Rock Hound's 1st Choice!