Hi Pearly!
Take a look at this link: http://en.wikipedia.org/wiki/Rudraksha
Bronzite does look a little like Pietersite but it much heavier, that‘s why I like it for a pendulum, it has that extra bit of weight behind it.
‘These stones are the result of the ancient primal dance of weather and geological trauma with Iron and Silica. Bronzite is the middle element in a family of crystals called Pyroxenes. The older and younger elements being Hypersthene and Enstatite. Bronzite, inbetween these two gemstones is the result of the weathering of Enstatite and Hypersthene. As wind, rain and other elements break down the soft (but strong) crystals more and more of the Magnesium is replaced by Iron, Hematite and Goethite (Iron derivatives), resulting in a dark black, brown or greenish stone speckled and streaked with golden metallic patterns.’
Blessings
Sharon