Sigma Chi Sweetheart pendant

[Rnaknott]

I found a Sigma Chi pendant at an antique shop a few years back. It is heart shaped mother of Pearl with the crest in gold (22k maybe?). It has a hanger at top for a chain. It is 1.25 x 1 inch, and I would guess from
The 1950s or 60s.

[naraht]

How common are official sweetheart jewelry? Alpha Phi Omega has a sweetheart pin, but at about the same level of fanciness as the brother pin, which is to say not at all (it was less than $10 when I joined in the 1980s)