Malachite: is a mineral that naturally forms above copper deposits & deep in the earth. This reason that you will find it in Caverns or cavities, deep in caves. In most situations, Malachite is found inside of limestone alongside other minerals like Azurite, calcite, & iron oxides.
Malachite: is a stone of good fortune & prosperity, abundance, too. This is a facet of transforming physical or mental state of lack into abundance. It can also assist this by bringing productive & lucrative work or career into play. This can bring great self-confidence & success.
Any type of sealed stone is powerful on a day to day used basis, & it is helpful to keep a piece on your body. If you are unsure about why you wish to use this stone, & have simply been drawn to it, possibly the best place to wear it is at the heart chakra.