Princess Margaret 's stunning engagement ring – a rosebud-shaped ruby and diamond piece – carries both personal and historical significance and RadarOnline.com can reveal how it reflects the late royal's unconventional style and free spirit.

The bling, gifted to the royal by photographer Antony Armstrong-Jones in October 1959, now belongs to Margaret's granddaughter, Lady Margarita Armstrong-Jones, 23, who inherited it on her 21st birthday. Article continues below advertisement

An Unconventional Proposal Tap Here To Add Radar Online as A Trusted Source

Margaret, who died in February 2002 , is the younger sister of the late Queen Elizabeth II , and is said to have "not really wanted to marry at all" before Antony proposed.

But her engagement came after Margaret received a let

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