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These are natural volcanic lava pebbles, roughly 3/8 inch across, sold in a 12 lb bag. The porous, lightweight texture and deep black color suit top dressing for succulents, cacti and bonsai, and they hold their color without staining or fading. They also work in freshwater aquariums, terrariums, vase fillers and fire pits. Against dyed or polished decorative gravel, the appeal is the natural porous look and the multi-use range; the trade-off is that the pieces are small and vary in shape, so they read as gravel rather than uniform stone.
In stockSold by Xing HuianReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.
These black lava rocks are made from natural volcanic rock. Each piece has a deep, uniform black color and a porous, lightweight texture. The pieces are about 3/8 inch (6-9mm) in size. They darken slightly in water and hold their color over time without staining or fading.
They work as a top dressing for succulents, cacti and bonsai, and they add texture to potting soil. Outdoors, they stand up to sun and rain, so they can be used in garden beds, pathway surfaces and landscape features.
The varied shapes suit freshwater aquariums, where they can be used to build slopes, form caves and create an aquascape. They are also used in terrariums, decorative beds, vase fillers, fire pits and DIY projects.
