Background of Malachite [Cu2(CO3)(OH) 2]
The name Malachite is coming from a Greek word for “mallow”, a green herb. It was used as a mineral pigment in green paints form antiquity until 1800. Due to its unique green-banded appearance and its luxurious metallic look, it is a very popular semi-precious stone. Most of the specimens contains a combination of other minerals such as dark blue azurite, sparking black mottramite, bably blue chrysocolla, or rusty red limonite.
The malachite is more common in its large rock form; the crystalline form is much rarer. One of its more unique habits is its fine acicular crusts and tufts. The thin hair quality gives it an appearance of rich green velvet.
As for collectors, be careful pseduomalachite, a mineral that is very different in structure than malachite, but looks very similar. It is a copper phosphate that has a massive crystal habit and color that are very similar to malachite’s.
The slab is highly polished. Its smooth surface is shine with lustrous green color. The famous green bans are visible throughout. On the back, there is a portion of the un-polished part that exposed the bobbling aspect of the mineral (shown in picture 2). It is about 4.125 x 3.625 inches and weights 11 lb and 14.1 oz.