How Do You Call These Wall Stones?

[NeoBY 1]

Try http://craftstone.com.sg/vintage.htm. Contact them. The guy Benjamin quite friendly and helpful.

[canaille 0]

they can be dust traps. my family thought of using them for our water feature but decided otherwise coz they can turn green with moss growing in them.

[dr34m 0]

looks great but looks painful if accidentally brushed against. maybe for some higher wall :/