PAVOI14K Gold Plated Cubic Zirconia Heart Necklace | Cute Dainty Love Pendant Necklaces for Women

what are the actual dimensions of the heart? The ones given on the website are for the package it comes in, not the heart itself

Are these hypoallergenic?

Does the “rose gold plated” one have the chain length adjuster to make shorter?

Does this tarnish or turn green ?