Emeralds
The name is derived from a French word 'esmeraude'. This word had its origin from Latin and Greek word 'smaragdos' meaning green stone. It was discovered many thousands of years ago in the mines of Egypt
"And the second row shall be an emerald, a sapphire, and a diamond." Today the finest quality of this precious gemstone is found from Zambian Africa mines, and South American Columbian mines.
The main difference in those sources and the inclusions in the stones. Columbian stones have more inclusions.
The rare prized form of emerald, found only in the Muzo mining district of Colombia, is a very unusual form of this gem. This emerald, known as "Trapiche emerald" is characterized by star-shaped rays that emanate from its center in a hexagonal pattern. These rays appear much like asterism, but, unlike asterism, they are not caused by light reflection from tiny parallel inclusions, but by black carbon impurities that happen to form in the same pattern.
The synthetic emeralds currently produced are so similar to true, natural emeralds that they are virtually indistinguishable by normal means. Here are two of the names for synthetic emeralds. Biron Emeralds and Chatham Emeralds. Any honest reputable dealer will tell you the truth about the Emeralds that he carries.
2 mm just over 1/16 inch
3 mm just over 3/32 inch
4 mm just over 1/8 inch
5 mm -----------------3/16 inch
6 mm just under 1/4 inch
7 mm just over 1/4 inch
8 mm ------------------5/16 inch
9 mm just under 3/8 inch
10 mm just over 3/8 inch
11 mm -----------------------7/16 inch
12 mm just under 1/2 inch
13 mm just over 1/2 inch
14 mm -----------------------9/16 inch
15 mm just under 5/8 inch
16 mm -----------------------5/8 inch
17 mm just under 11/16 inch
18 mm just under 3/4 inch
So I hope this helps you to be able to size things. In my opinion true Emeralds are to soft for Ring Gems.
If you want the rich green of Emeralds, I suggest other stones like Chrome Tourmaline and
Tsavorite Garnet . These will wear better, have better optical performance and are natural, not oiled
and treated like almost all Emeralds from nature are. Soap and water damages real true emeralds.
Beryl, which is colorless in its pure mineral form, Be3Al2[Si6O18], becomes emerald with chromium impurities. With manganese impurities beryl becomes pink morganite; with iron, aquamarine. In aquamarine, the impurities that cause the colors occur in atom-sized, straw-like channels in the mineral's structure.
Tsavorite or tsavolite is a variety of the garnet group species grossular, a calcium-aluminum garnet with the formula Ca3Al2Si3O12. Trace amounts of vanadium or chromium provide the green color.
Green grossular had been rare until 1967, when British gem prospector and geologist Campbell R. Bridges came across a deposit of the mineral in the mountains of north-east Tanzaniae.
 | Stunning Top Emerald Cut
2.75 Carats
10 x 8 mm= just over 3/8 inch long
Acquired from England | $655 |
 | A Great Emerald Crystal on Matrix 1.7 inches long From Zambia, Africa A remarkable rough specimen in our vault. | Not for Sale. |
 | Very Exclusive Octagon Biron Emerald 2.15 Carats Dark Columbian Green 10 X 7mm = just over 3/8 inch long Origin Zambia, Africa | $675 |
 | Very Large Round Deep Chatham Emerald 3.45 Carats and 10mm across = over 3/8 inch across. A Chatham creation for English aristocracy. | $410 |
 | Another Beautiful Rare Green Emerald-Cut Natural Unheated Amethyst 34.39 Carats Hardness 7 Big as you can see. Uruguay produces some of the world's finest Gems. 20.8 X 17.8 X 11.5mm = over 0.81 inch | $553 |
 | Not an Emerald. But a Dazzeling Amethyst Green Emerald Cut Very Large 23.75 Carats 21.5 X 13.4 = over 3/4 inch long Very Clean Unheated Mohs 7 Much safer to wear than the Emerald. | $381 |
 | Flashing Pear Cut Green AAA+Amethyst 20.05 Carats 21.4 X 16.5mm = over 3/4 inch long. Hard 7 as all Amethyst are. Gorgeous on a long fingered Lady. | $322 |
 | The absolute best qualities of Colombian Emerald sell for up to $500,000.00 PER CARAT at auctions such as Christies and Sotheby's. 4.66 X 3.24mm = just over 1/8 inch long A real true Emerald from Zambia, Africa About like a BB we shot in BB Guns as kids. Ask some Jeweler what a 1/8 inch REAL Emerald will cost. So small for the price that I will not even sell it for $25 or I would be ashamed. | Not even for Sale |
 | Expensive Emerald Crystal From Zambia, in central southern Africa. Income Average $2 per day. A large Emerald brings a decade of wealth to a village. | Not for Sale |
 | Large Emerald Crystal on Matrix 2.5 inches across, amazing From Zambia, Africa in our Vault. | Not for Sale very hard to get. |
