OSCAR HEYMAN: RUBY AND DIAMOND RINGThe oval-cut ruby, weighing 5.01 carats, between demi-lune-shaped diamond shoulders,diamonds approximately 1.00 carats total, numbered 300436, maker's mark, ring size JFor further information on this lot please visit theProvenance: Apanied by a report from GRS stating that the ruby is 'pigeon's blood' red, of Burmese origin with indications of heat treatment and insignificant residue in fissures. Report number GRS2021-096554, dated 9th September 2021.Apanied by a report from GIA stating that the ruby is 'pigeon's blood' red, of Burmese origin with indications of heat treatment and minor residue in fissures. Report number 1226015444, dated 3rd September 2021.Historically, across many cultures, the ruby has long been regarded as a highly important gem offering cures for illness, peace, protection, wealth and status and in India, rubies were bestowed with the Sanskrit name, 'Ratnaraj' or 'King of Precious Stones'. Over the past 800 years, the finest rubies have been found in the Mogok Stone Tract region of Burma, now Myanmar. This continues to be the case today, despite rubies being mined in various other locations, such as Afghanistan, Thailand, Tanzania and Madagascar.The best Burmese rubies are the gold standard against which all other rubies are judged. Throughout the world, they are prized for their rich, vibrant red hue and fiery radiance, caused by high levels of chromium saturating the ground from which they are minedbined with strong fluorescence. Today, the continued extraction of deposits in the Mogok Stone Tract region is leading to depleted sources of gem-quality crystals that tend to be quite small, adding to the beauty and rarity of a truly fine ruby exceeding 5.00 carats.