It’s technically a pallasitic meteorite, and the green-yellow transparent minerals are called olivine, which composes most of the upper mantle of the Earth. The metallic parts are an iron-nickel alloy.
Genuine Natural Citrine crystals are distinct and easy to tell apart from the "Burnt Amethyst" ones. but still people offer it for sale everywhere. Here is how to easily spot the Fake Citrine and learn about Natural Citrines.