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Amazon.com: GASPRO 10 lb Large Black Lava Rocks, 1-3 Inch, Ideal for Outdoor Fire Pits, Indoor Fireplaces with Propane and Natural Gas : Patio, Lawn & Garden
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Amazon.com : Natural Black Lava Rock for Aquariums, Fish Tanks, Terrariums, Reptile Enclosures - Mix of Small and Large Stones, by SubstateSource (10 Pounds) : Pet Supplies
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