Antique ring with emerald and brillyantami

[redbor]

[sergejnowo]

[NATA NOVA]

Looked ..

[sergejnowo]

[Любознательный]

So much has been written about the ring like that only marvel.
How can nafantazirovat on the basis of a pair of muddy photos!
First of all, diamonds (in the proper sense of the term) in the ring there. There is something like chalk.
So start from the beginning. With diamonds. But briefly.
Imagine two four-sided pyramid, fused with their lower platforms. This is the natural form of diamond. Upper (lower) part of the diamond is cut off for subsequent cut the rest, which will become a diamond (the modern cut - not less than 57 facets).
The segment weighs less than 0.2 carat and cut it after referred to as chalk.
So, is probably an emerald ring, surrounded by possibly Cretaceous.
Everything else written about the ring - fancy a pleasant topic.
Now about the rest of the terminology.
Given the rarity and high price of precious stones are sometimes produced duplicate - one piece of stone, and another made of glass or semiprecious stone.
Fakes I omit.
In the 20 century learned to create synthetic versions of precious stones, including diamonds. In the USSR there existed such an enterprise. Synthetic diamond has a crystal lattice.
Synthetic diamond has no relation to the cubic zirconia - synthetic stone with a high refractive index koeffitsiegntom created in the FIAN and izgotalivaemu corner Nakhimovsky and Sevastopolkogo avenues in Moscow (I do not know what to call this company now).
From natural diamonds only a small part is suitable for use in jewelry purposes. The rest belongs to the industrial diamonds.
I will not izgalyatsya about types of cut diamonds, their assessment criteria - this will have to write too much and cause a lot of pictures. But if members of the forum has an interest, it is ready to open a separate topic.
The color of diamonds and, accordingly, diamonds are different. Yakut Amaziah are yellowish natsvet.
The game is an expansion of the diamond white on all colors of the spectrum due to its cut. After contact with him the light of a different color, this light can be decomposed into components (the laws of optics).
Returning to the ring.
It can not be assessed or evaluated on the photo. Just picking up. Magnifiers 20x and 30x - not uncommon. There is a sale so far.

[neborator]

[artman]

neborator, it most likely is not emerald, emerald because the density of large as that of sapphire (7) and the emerald is not peculiar to fray as you wrote, and to make sure go to the gemological expertise and there will tell you about all the stones, and even paper and will podtverzhdeniem.Na with many borders have aparatus to verify any metal, stone, etc. etc.

[Любознательный]

Сообщение от artman

neborator, it most likely is not emerald, emerald because the density of large as that of sapphire (7) and the emerald is not peculiar to fray as you wrote, and to make sure go to the gemological expertise and there will tell you about the stones all, and even paper and give to podtverzhdeniem.Na many borders have aparatus to verify any metal, stone, etc. etc.

And where did you get that Neborator not only a professional art dealer, but not a sculptor - a jeweler. Maybe he took the advice of Dobrokhotov Bulgarian kilowatts to 10 (with a diamond disk), and cut off all unnecessary to make a stone of the spirit of modernity? Peregranil, so to speak. No further polishing.

Neborator, do not drive horses in a straight line M2 (E95). At the Belgorod customs inspection is not conducted - were going all in Voronezh. Better locomotive to Vlad. At the same time, and his book append - we rejoice.
Mind about going, dropping into a gemological museum. As for Lenin, not reaching pl.Gagarina on the right side.
Good luck!

[neborator]

[uriart]

I've marveled dayus as necessary patience to spoon-feed people what to do gemekspertizu and all will become clear.