What are these black shiny rocks in my yard? They are about the

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Specimen Identification Guide, Public

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What is this strange black rock I found at the beach today? It has shiny sparkly parts on it, and is not charcoal. : r/whatsthisrock

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MSI Ash 0.4 cu. ft. per Bag (1 in. to 2 in.) Bagged Landscape Pebbles (1 Bag/0.4 cu. ft.) LHDPEBQASH5PB - The Home Depot

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