This heart is approximately 2.5cm high. It's on a double silver open box chain, the upper is 18" the lower 20".  This small series of necklaces feature Rainbow Obsidian hearts. Rinbow Obsidian is a naturally formed volcanic glass, it appears black, but when it has been carved and light hits it, it shows bands of gorgeous colours. These depend on the Magnetite inclusions within it, which refract light. 
 
Rainbow obsidian is said to be a protective stone that energetically protects you from emotional and psychic harm, shielding you from negativity.
 
Hallmarked at London Assay office to prove it is of the metals stated, this will be sent giftboxed.
 
As ever, any queries can come to me at lydia@niziblian.com