Is the Mallory Heart in Her Scandalous Affair based on a real jewel?

It’s based on a composite of several real Elizabethan jewels. I collect sentimental jewelry (eg Georgian mourning brooches and hearts) and love all the sentimental iconography built into their designs. I wanted the Mallory Heart to be dripping with sentiment. And I wanted it to be older than my pieces. Elizabethan pieces are often filled with symbols and sentiment, and I used a couple of pieces from the Victoria and Albert Museum as my inspiration for the Mallory Heart. You can read more about it on the Behind the Scenes page for Her Scandalous Affair.