The lava gravel is rather a rough stone, it is used for the decoration of gardens, courtyards, roundabouts and even Japanese gardens. It contrasts nicely with the white and light colours.
This natural material is also widely used on plant and tree partridges because it maintains moisture and it is a good natural filter.
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How to measure?
Each big bag weighs 1000 kg, which corresponds to 0.90 m3 (1 m3 = 1,100 kg)
For 5 cm high, 1 big bag of 1000 kg will cover about 18 m2
For 4 cm high, 1 big bag of 1000 kg will cover about 22 m2
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