Hollywood jeweler Jack Armstrong is putting a 733-carat jewel, the Black Star of Queensland sapphire, on the market -- but he's not willing to let go of it if he doesn't get his price.

It is the featured pendant on a necklace comprised of 70 black star sapphires, totaling an additional 104.42 carats. The entire piece is set in 18k rose gold and has a retail price of $5 million.

The Black Star Sapphire of Queensland, valued at $100 million, will be on display at the Royal Ontario Museum starting June 2.

A privately owned jewel threatens to outshine the Michael Lee Chin Crystal next month when the Royal Ontario Museum opens its new galleries. A symbol of faith, hope and destiny in many cultures, this ...

The black star of Queensland. Sapphires and rubies were created many millions of years ago through one of two geological processes: metamorphic (involving rock transformation) ...