Inside the heart it can hold one stone at a time. You can put a few drops of any essential oil to the lava rock you choose to put in the locket.
I have placed a nickel next to the stones so you can gauge their size. The scent stays on thru out the day which is pretty nice.
The chain is a snake style chain. I love this type of chain because it never kinks up. The chain measures 23.5" (not including the clasp or adjustable portion). The adjustable portion measures 2". The clasp is a lobster claw style and is easy to open and shut.
The seller offers a 100% money back guarantee.
*Please note, essential oils are not included with this purchase.
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I received this product either free or at a discount in exchange for a fair and unbiased review.