This is a piece of Howlite, that's been dyed blue, then shaped and polished into a love heart.
Howlite is a naturally white to grey mineral with lovely grey to black veining patterns. Due to the superficial resemblance these patterns have to Turquoise, Howlite is commonly dyed blue and sold under names like Turquenite or Lapis Turquoise or surprisingly just as Turquoise in many cases.
Always buy Turquoise from reputable dealers only, we see Blue dyed Howlite being sold as Turquoise by many shops and especially Online stores. We GUARANTEE that all our Turquoise is 100% Natural Turquoise, and our dyed Howlite will always be sold as Howlite.