Emerald Diamond Jams Stone Jewellery Necklace.

Emerald Diamond Jams Stone Jewellery Necklace.

By Stone.

Origin determinations

Since the onset of concerns regarding diamond origins, research has been conducted to determine if the mining location could be determined for an emerald already in circulation.

Emerald Diamond Wedding Jewellery Necklace Set.

Emerald Diamond Wedding Jewellery Necklace Set.

By Stone.

Zambia is the world's second biggest producer, with its Kafubu River area deposits (Kagem Mines) about 45 km (28 mi) southwest of Kitwe responsible for 20% of the world's production of gem-quality stones in 2004. In the first half of 2011, the Kagem Mines produced 3.74 tons of emeralds.

Emerald Diamond Gold Jewellery Locket Chain.

Emerald Diamond Gold Jewellery Locket Chain.

By Stone.

Colombia is by far the world's largest producer of emeralds, constituting 50–95% of the world production, with the number depending on the year, source and grade.

Emerald Diamond Jewellery Necklace.

Emerald Diamond Jewellery Necklace.

By Stone. 

Emerald mines

A Colombian trapiche emerald

Emeralds in antiquity were mined in Egypt at locations on Mount Smaragdus since 1500 BCE, and India, and Austria since at least the 14th century CE.

Emerald Diamond Whit Gold Jewellery Necklace.

Emerald Diamond Whit Gold Jewellery Necklace.

By Stone.

These categories reflect levels of enhancement, not clarity. A gem graded none on the enhancement scale may still exhibit visible inclusions. Laboratories apply these criteria differently. Some gemologists consider the mere presence of oil or polymers to constitute enhancement. Others may ignore traces of oil if the presence of the material does not improve the look of the gemstone.

Emerald Diamond Gold Jewellery Locket Set.

Emerald Diamond Gold Jewellery Locket Set.

By Stone.

Treatments

Most emeralds are oiled as part of the post-lapidary process, in order to fill in surface-reaching cracks so that clarity and stability are improved. Cedar oil, having a similar refractive index, is often used in this widely adopted practice. Other liquids, including synthetic oils and polymers with refractive indexes close to that of emeralds, such as Opticon, are also used. These treatments are typically applied in a vacuum chamber under mild heat, to open the pores of the stone and allow the fracture-filling agent to be absorbed more effectively.

Emerald Diamond Jewellery Necklace

Emerald Diamond Jewellery Necklace.

Color

By Mans Women Jewellery.

In gemology, color is divided into three components: hue, saturation, and tone. Emeralds occur in hues ranging from yellow-green to blue-green, with the primary hue necessarily being green. Yellow and blue are the normal secondary hues found in emeralds. Only gems that are medium to dark in tone are considered emeralds; light-toned gems are known instead by the species name green beryl. The finest emeralds are approximately 75% tone on a scale where 0% tone is colorless and 100% is opaque black. In addition, a fine emerald will be saturated and have a hue that is bright (vivid). Gray is the normal saturation modifier or mask found in emeralds; a grayish-green hue is a dull-green hue.

Emerald Diamond Jewellery Necklace

Emerald Diamond Jewellery Necklace 

By Mans Women Jewellery.

In the 1960s, the American jewelry industry changed the definition of emerald to include the green vanadium-bearing beryl. As a result, vanadium emeralds purchased as emeralds in the United States are not recognized as such in the UK and Europe. In America, the distinction between traditional emeralds and the new vanadium kind is often reflected in the use of terms such as "Colombian emerald".

Emerald Wedding Ring Jewellery

Emerald Wedding Ring Jewellery 

By Mans Women Jewellery

References 

Emerald is a gemstone and a variety of the mineral beryl (Be3Al2(SiO3)6) colored green by trace amounts of chromium and sometimes vanadium. Beryl has a hardness of 7.5–8 on the Mohs scale. Most emeralds are highly included, so their toughness (resistance to breakage) is classified as generally poor. Emerald is a cyclosilicate.

Etymology

The word "emerald" is derived (via Old French: esmeraude and Middle English: emeraude), from Vulgar Latin: esmaralda/esmarald us, a variant of Latin smaragdus, which originated in Ancient Greek: σμάραγδος (smaragdos; "green gem").

Properties determining value