- Featherock (volcanic pumice stone) landscaping boulders are the perfect natural, lightweight material for landscaping projects. The lightest of all boulders, they even float in water!  These boulders and sculptures also have the added benefit of ease of installation.  No need to crack your driveway bringing in a 6' boulder, let Featherock make a landscape statement without ruining your investment in concrete! Featherock is 1/4 the weight of granite!  Get more rock for your money with Featherock!

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