Volcanic charcoal bonsai

Volcanic stone charcoal bonsai

　　Volcanic stone charcoal bonsai

　　The volcanic stones in these bonsai are taken from the volcanic rocks of Changbai Mountain, paired with charcoal and oxygen-emitting plants like orchids. Such bonsai can absorb carbon dioxide and residual harmful gases such as formaldehyde from renovation, and release oxygen indoors. However, their market prices are also quite high, with an ordinary volcanic stone charcoal bonsai costing around a thousand yuan.