Dresden's Pentacle
thingiverse
Harry received a silver necklace from his mother, and years later he acquired a jewel to fit inside it that clarified everything. If you want to place an order, I have a store here: https://www.shapeways.com/product/WUB3D57JC/dresden-pentagram?optionId=61654489&li=shop-inventoryhttps://www.shapeways.com/product/FE5LDS3SJ/dresden-jewel?optionId=61654476&li=shop-inventory
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