This dark stone is known as a protector and a grounder.
Mahogany obsidian in particular is good for cutting the cords in relationships that no longer serve purpose or goodness in our lives. Obsidian helps the wearer embrace their "darkness" and clear negative energies or patterns that you carry. It connects to your root chakra, stabilising your energy and bringing you back down to earth. The is a stone that can really aid in any shadow work you're embarking on.
This necklace was handmade in my studio by electroforming copper onto the crystal. Each piece takes 6-10 hours to complete and the finish is a unique and raw piece of jewellery.
NOTE: All stones are natural, you may not receive the one in the photo, every piece is wonderfully unique.