Yesterday, Tuesday, July 19th, news broke of the engagement between Pippa Middleton - younger sister to Duchess of Cambridge, Princess Kate, and her hedge fund manager beau, James Matthews.

Pippa and James have been a couple for about 4 years now, and reports say the engagement came as a bit of a surprise to sister, Princess Kate.

Although the couple got engaged on Sunday, July 17th, Pippa gave the world a first glimpse of her rock yesterday.

Expectedly, the ring has got jewellery experts talking, as she is after all, the younger sister to the world's most famous princess.

Here are 4 interesting things you should know about Princess Kate's sister's stunning $45,000 engagement ring:

  • The ring is an
  • According to Los Angeles Jeweler,
  • The ring can buy an entire house in Nigeria as it costs anything from  $45,000 (about 14,000) to $175,000 (about N52 million).
  • The ring is reminiscent of vintage art deco as it has a retro feel to it unlike sister, Kate's own which is a timeless, 12-carat ring.