These two large Burmese ruins were taken to England in 1875 and weigh 37 and 47 ct.
They were marketed by the Myanmar kings and later trimmed by Forster to 32 5/16 and 39 9/16 cts ('38 9/16 ct), one for £10,000 and the other for £20,000. Sotheby' s also indicated that it could be another well-known but untitled ruby of 46¾ carat; elongated in shape (probably cut); set in a pin with four brilliants and purchased for 8000 pounds at Christie's of London on 7 May 1896.
Mandalay ruby, from the area. Well-known or not, the Mandalay ruby is one of the biggest and finest jewels in the whole wide range.
Mandalay Ruby is a gem of Myanmar origins, named after Mandalay, a town on the Irrawaddy Riverside in downtown Burma. The Mandalay is the second biggest town in Burma (Myanmar) after the capitol Rangoon (Yangon) and is almost in the centre of the state. andalay is almost a centre of the country's internal relations, focusing on the four major forms of communication: road, railway, aviation and inland navigation.
Mogok' s renowned ruby mine is located about 100 km from Mandalay. 019 carat Mandalay Ruby, no doubt found in the Mogok Mine, and whoever possesses this precious stone called it the Mandalay Ruby to immortalize the name of this historical town.
Mandalay ruby is a 48. 019 carat, cushion-cut ruby colour, almost immaculate with good translucency and an intensive reddish colour that almost approximates the colour of the dove' s pen. Sotheby' s Auctions sold the gem for $15 million in advance at the October 1988 auctions.
Colour is the most important parameter that defines the value of a ruby. Ruby's best colour is an intensive, deep carmine colour, generally known as pigeon's colour. A ruby that is too deep or too bright has a lower value. Intensive violet or browns in vivid reds are also precious.
This is followed by the rose or rose colour of the Sri Lankan ruby. Gems that are too bright in colour are called rose coloured saphires. The clearness of the gem is also an important element, but it is important to remember that there are no jewels in the whole wide universe that are totally impeccable and free of impurities.
Indeed, the existence of inclusion is a distinctive feature that distinguishes ruby from imitation stones, which can calm the purchaser about the genuineness of the gem.
In case the satin is too much, the colour could be masking and the gem could appear grey, which is not desired. Pillow cutting and ovals are the most common types of cutting for ruby. Cabochons are used for stellar ruins and rubies that are not sufficiently clear for bevelling.
Sternrubine requires a well definied six-pointed asterisk, well centred in the center of the combo. There must be all the stars' beams. Combination of the ideal badge with the most suitable colour, which should be intensive and bright carmine red for stellar ruby.
However, such a ruby with a flawless badge in combination with a flawless colour is extremly seldom. In this case you could be satisfied with a less ideal colored or less ideal colored stellar. Gemmologists have found that the ideal asterisk is usually mixed with the less perfectly light shades of reds, such as pink-red or reddish-pink, such as Sri Lankan-stars.
Ruby and sapphire are the same group of mineral substances that is known as aluminium alumina, which is also known as aluminium crystall. Roughnuts' reddish colour is due to some chromatoms that displace aluminium molecules in the aluminium oxides grid. Because of the existence of ferrous aromas in combination with chrome, the ruby is darkened and gives it a brown or violet colour, as in Thai rubies. Therefore, the ruby has a special colour.
They crystallise in the trigonale crystalline system and form small prismatic hexagons. Burmese ruby shows a powerful reddish fluorescent effect under ultra-violet and sometimes in bright UV sunshine. Thailändische Rubine show a less intensive reddish fluorescent effect in the UV-Licht, caused by the existence of irons. The ruby of Sri Lanka shows a powerful orange-red fluorescent effect in long-wave UV radiation.
Ruby has a firmness of 9 on the mortar dial. Because of the ruby's outstanding firmness and tenacity, they have a long service life and are less susceptible to abrasion. These jewels are perfect for binding long-lasting jewellery, either alone or in conjunction with beads. Each ruby's weight varies between 3.99 and 4.02.
Roubins have dual indexes of refraction, the interims are 1. 761 and 1.769. Ruby is also a low emulsion, i. e. 0.018. That is one of the reasons why diamond has more fire than ruby. Ruby also show a pronounced dichroicity, with the lowest colour vertical to the C-axis. Both colours, which appear during the examination with a microscope, are intensely violet-red and bright orange-red.
Ruby's characteristic can help someone to tell the difference between real ruby and either ruby, spinell or ruby, which are not dichroitic crystals of the Istrian crystalline system, also known as the cubical one. Mandalay Ruby's spring is without doubt the Mogok block of Burma, but the precise date of its creation is not known.
However, it is generally assumed that the Mandalay ruby is a pre-1890 gem. Mogok derives its name from the Myanmar term "Mong Kut", which means the "winding valley" that characterizes the area' s natural characteristics in the north of Burma, located about 1230 metres above the surface of the Shan Plateau.
Metamorphous rock was then exposed to long erosions on a geologic timescale of several million years, and the gravel core was liberated, the mounds were flushed down and stored as soap sediments in the underlying valley, where today ruby, sapphire and other precious stones are extracted.
It seems that in the fifteenth centuary robinia was found in Mogok by rogues and thugs who were forcibly evicted from the Mandalay area. Ex-cons sent the jewels as presents to the con. But instead of going back to their former towns, they chose to remain in Mogok and use the recently found Mining.
In the meantime, the court announced a ruling that all large jewels found in the mine would become state ownership, with the death penalty threatening the miners' souls. Because of the hardness of the decrees, all large jewels entered the ground, and the fracturing of large crystal into legal durable size.
As a result of strict state control, most of the extracted jewels were trafficked across the Bengal Peninsula and finally arrived in Calcutta (Kolkata), the next trading town in Bengal, from where they came to the palace of the wealthy Maharajas or were resold to Westerners. Mogok ruby refills had been the leading global ruby resource for over 600 years, but the oldest ruby resource was Sri Lanka.
Following the continued exploration of the Mogok ruby mine for over 600 years, reserves have almost been depleted and several new landmines such as the Mong Hsu Mine, 60 leagues southward of Mogok, have been located. Mong Hsu Rubins are a grenade looking ruby with a deep reddish colour after thermal-treated.
Today, most Mong Hsu Ruby are trafficked across the Thai frontier to Chantaburi, where they are heat-treated and sent to the Bangkok gemstone store for recycling. Mandalay Ruby was auctioned on October 18, 1988 on the commission of its anonymity owners at Sotheby's in New York.
019-carat, cushion-cut ruby was the biggest ruby ever presented at public tender, and had placed a pre-sale estimation of $15 million on it. Sotheby' s tried during an ad campain that led to the October 1988 sales to give the precious stone a historic value by identifying it with some historic jewels such as the J. N. Forster ruby and the untitled elongated ruby marketed in London in 1896.
J. N. Forster Ruby were two large Burmese ruby with a weight of 37 carat and 47 carat, which were imported to England in 1875. J. N. Forster has resharpened the two jewels to west scales, thereby decreasing the ruby sizes to 32. Mandalay ruby, on the other hand, is 48. The 019 carat is much higher than the weight of the Forster ruby.
Therefore, it is not possible to maintain efforts to detect the Mandalay ruby with the greater Forster ruby. 75 carat long ruby in a pin together with four brilliants was on sale for 8,000 pounds. Sotheby' s trying to ID this ruby with the 48. 019 carat Mandalay ruby are also unsustainable due to the difference in weights.
of the Mandalay ruby is not known. 3) Rubin- und Saphir-Notizen - Site Web du Département des sciences géologiques de l'Université du Texas.