Vietnam or Thailand ? Vote for the TOP Country of the Week !
Updated: May 19, 2025
The infinite hues and markings of the coloured marbles have all been painted by Nature with one material only, variously proportioned and applied the oxide of iron. The varieties of marble are mainly caused by the different degrees in which this substance has pervaded them. They are variable mixtures of the metamorphous carbonates of protoxide of iron and lime.
Word Of The Day
Others Looking