Montblanc: Albert Einstein 18K white gold limited edition 99 skeleton fountain pen in the original numbered, lacquered case of issue: pen number 2 of 99 (although it appears that only 45 examples were put on the market), 2012. A reference to the chemical element E»EinsteiniumE¼ with the ordinal number 99, the limited edition is a masterpiece in design. Every detail brings to life the ground-breaking work that earned Einstein the Nobel Prizein Physics (1921) and such respect and admiration internationally. Crafted from 750 solid white gold, the body of this precious pen is covered with a skeleton net with a filigree overlay representing the space-time curve, Einstein's disruptive discovery that demonstrated how in his universe, space and time are no longer flat but can pushed and pulled, stretched and warped by matter. The filigree engravings on the barrel and cone of the pen reflect his most famous formulas, and the nib is enriched with the engraving of the chemical element E»EinsteiniumE¼ or E»EsE¼, a rare radioactive metal named after Einstein to honour his achievements. The penE¼s clip features a sapphire bowl of approximately 1.3 ct, while the iconic star-shaped Montblanc emblem carved out of moonstone, crowns the cap of this masterpiece.
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- Carat - A carat (abbreviated "ct") is a unit of measurement used to describe the weight of a diamond or other gemstone, and separately is a unit of measurement used to describe the weight of precious metals such as gold,.
For gemstones, one carat is equal to 0.2 grams or 200 milligrams. The weight of a diamond is one of the Four Cs (along with cut, colour, and clarity) that are used to determine a diamond's value.
It is important to note that a diamond's weight does not necessarily correspond to its size. A diamond's cut, which affects how well it reflects light, can make a diamond of a lower weight appear larger than a diamond of a higher weight. Additionally, the carat is not the only factor to determine the value of a diamond, other factors such as clarity, colour and cut are important too.
In the gold industry, the purity of gold is measured in carats (abbreviated "ct"), with 24 karats being pure gold and lower carat numbers indicating a lower purity level. So, for example, 18 carat gold is 18/24 or 75% pure gold, and 12 carat gold is 12/24 or 50% pure gold.
- Filigree Work - Decorative Arts - Delicate decorations using fine threads of ceramics, glass or other materials to give a lace-like effect, attached together and applied as an ornament.
- Cone - A popular decorative motif based on the shape of the pine cone, and used in silver ceramics and furniture. Because of its shape it is most suitable for use as a finial.
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