Pyrite is formed in hydrothermal veins, sedimentary rocks, and metamorphic rocks. It requires iron, sulfur, and certain environmental conditions for its formation. Bacterial action can also contribute to its formation in sedimentary rocks.
Note--1)Crack-like lines, fissures, uneven texture or beads and crystals are natural.
2)If a crystal breaks or snaps in half or in pieces, or sometimes could break while in transport … it does not affect the quality of the crystal. Crystals are naturally brittle and a broken crystal just means now you have more than one piece. Any crystal piece you have is any way broken from a larger chunk.
3)In case your bracelet, pendant, or ring feels like it’s not your size, feel free to transfer them in a new string or to get them re-made with a jeweler. If a bracelet string breaks at some point, just put the beads in a new string.