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The great expense of refining the metal made the small available quantity of pure aluminium more valuable than gold. [16] Bars of aluminium were exhibited at the Exposition Universelle of 1855 , [ 17 ] and Napoleon III 's most important guests were given aluminium cutlery, while those less worthy dined with mere silver. [ 16 ]
The Sunrise Ruby [1] [2] [3] has been the world's most expensive ruby, most expensive coloured gemstone, and most expensive gemstone other than a diamond [2] [3] [4] until the discovery of the Estrela de Fura. Originally mined in Myanmar, its current name is derived from a poem of the same name, written by the 13th-century Sufi poet Rumi. [5]
This is a list of the highest known prices paid for philatelic items, including stamps and covers.The current record price for a single stamp is US$9,480,000 paid for the British Guiana 1c magenta.
Nevertheless, diamonds, rubies, sapphires, and emeralds still have a reputation that exceeds those of other gemstones. [ 26 ] Rare or unusual gemstones, generally understood to include those gemstones which occur so infrequently in gem quality that they are scarcely known except to connoisseurs, include andalusite , axinite , cassiterite ...
It is an amulet, which comprises diamond, pearl, ruby, sapphire, emerald, topaz, cat's eye, coral, and hyacinth (red zircon). Each of these stones is associated with a celestial deity, representing the totality of the Hindu universe when all nine gems are together. The diamond is the most powerful gem among the nine stones.
For example, a "D" or "E" rated diamond (both grades are considered colorless) is much more valuable than an "R" or "Y" rated diamond (light yellow or brown). This is due to two effects: high-color diamonds are rarer, limiting supply; and the bright white appearance of high-color diamonds is more desired by consumers, increasing demand.
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One day, Ranjit Singh asked the diamond's former owners – Shuja and his wife Wafa Begum – to estimate its value. Wafa Begum replied that if a strong man threw a stone in four cardinal directions and vertically, Koh-i-Noor would be worth more than the gold and precious stones filled in the space.