Category Archives: Famous Gemstones

HIGHLIGHTS FROM ASTAGURU’S ONLINE AUCTION HEIRLOOM JEWELLERY, SILVER AND TIMEPIECES 20 – 21 OCTOBER 2020 (Page 2)

Lot 34 – A Pair of Antique Gold earrings Set With Diamonds, Circa 1900Estimate: INR 40 – 42 lakhs | US$ 56,338 – 59,155These fish hook gold earrings are set with large sparkling old European cut pear-shaped diamonds. The large diamonds dangle from two smaller circular European cut diamonds. The earrings also have a delicate […]

List of famous faceted topaz greater than 1000 carats in weight

Famous faceted topaz gemstones greater than 1,000 carats in weight, arranged in descending order of weights S/N Name Source Carat Weight Cut/Shape Color Present Owners 1 El-Dorado Topaz Brazil 31,000 emerald yellowish-brown Programa Royal Collections 2 Lua de Maraba Brazil 25,250 octagonal gray Programa Royal Collections 3 American Golden Topaz Brazil 22,892.5 cushion yellowish-brown NMNH […]

Famous Topaz Gemstones- Cut and Uncut

Chemistry of the mineral Topaz Topaz is a silicate mineral which is the largest and most important class of rock-forming minerals. Topaz belongs to the sub-class Nesosilicates, the simplest of all silicates in which the tetrahedral SiO4 units exist separately, but are held together by metal cations as in Garnets, Andalusite and Olivine, or form […]

World’s Largest Star Rose Quartz – Michael Scott Collection

Origin of name The Michael Scott Collection, arguably the most important private gem collection in the United States, with a few rivals in the world outside of the royal families, was started by Michael Scott, the first president of Apple Computer (1977-81), in 1987 and almost completed within a record-breaking period of 14 years. The […]

List of faceted rubies greater than 10-carats in weight

List of gem-quality faceted rubies greater than 10-carats in weight arranged in descending order of weights S/N Name Carat Weight Origin Cut-Shape Present Owner 1 Prince’s Ruby 174.67 unknown unknown Bowers Museum 2 Rosser Reeves 138.70 Sri Lanka cabochon star NMNH Smithsonian 3 DeLong Star 100.32 Burma cabochon star AMNH New York 4 Nga Mauk […]

Chhatrapati Manik Ruby

Origin of name The “Chhatrapati Manik Ruby” which according to legend is one of the oldest rubies in the world dating back to 380-415 AD, the period of rule of the powerful emperor of northern India, Candragupta II, also known as Vikramaditya (son of valour), gets its name from the title “Chhatrapati” (supreme king), which […]