Jewelry Glossary
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Eagle Prong
Eagle prong is a kind of ogre prong.
It is used to set pearls or facet cut gemstones. This prong looks similar to the shape of the eagle from its head to beak.
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Electroforming
Electroforming, also known as "electric casting," is a processing method that applies the principal way of plating to jewelry. This process involves plating a thickness of 150 to 300 microns (1 micron = 1/1000mm) first, then melting a mold plated afterward. This will leave the plated precious metal with a hollow structure. This processing method is suitable for creating three-dimensional earrings, piercings, pendant brooches, etc.
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Electrolytic Polishing
Electrolytic polishing is done before buff polishing. Generally, this process is applied to 18K gold.
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Elegance Chain
An elegance chain is made by pressing cable chain or kihei chain (curb chain).
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Emerald
Emerald is a gem which typically develops many inclusions such as cracks and scratches because it crystallizes under harsh conditions. It is sometimes referred to as "algae." There is a saying in the West that "there is no human and no emerald without a flaw." To hide scratches, many emeralds in the market are usually oil-treated.
Kyocera's Crescent Vert emerald is completely identical in composition compared to a natural emerald and compares favorably with gemstones from Muzo, exhibiting the same captivating color including blue undertones.
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Emerald
The deep green sparkle of emerald has mesmerized people since antiquity. The oldest of all jewels, emerald evokes comfort, creativity and bliss. Formed from beryl, alumina and silicic acid, the beautiful green color is produced by trace amounts of chrome within the gem. The world’s highest-grade emeralds come from a mine in Muzo, Colombia. Crescent Vert emerald compares favorably with gemstones from Muzo, exhibiting the same captivating color with blue undertones.
Available in sizes up to 1 carat.* If you need a larger stone, please contact us.View Comparison Table Item Crescent Vert Emerald Natural Emerald Chemical Composition 3BeO・Al2O3・6SiO2 3BeO・Al2O3・6SiO2 X-ray Diffraction Same as natural stone A pattern specific to Emerald Spectroscopic Analysis Same as natural stone Specific absorption of Emerald Crystal System Hexagonal Hexagonal Mohs Hardness 7.5～8.0 7.5～8.0 Specific Gravity 2.65～2.70 2.65～2.74 Melting Point 1410℃ 1410℃ Transparency Transparent Transparent ～ Translucent Refractive Index 1.563～1.568 1.565～1.598 Double Refraction 0.005 0.005～0.008 Average Dispersion 0.014 0.014 Pleochroism Green and Bluish green Green and Bluish green Chelsea Color Filter Examination Dark Red-Pink Dark Red-Pink [Moh's hardness: 7] [Mineral species: Beryl]
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Emerald Cut
When four corners of step-cut are cut/removed, it is called emerald cut.
The beauty of the emerald cut is judged by its transparency and appearance. Polishers call it a "cut that cannot hide the flaws in the material." Many of the high quality diamonds over 10ct that are on sale at current auctions are emerald cuts. -
Engagement Ring
The engagement ring is often given upon the occasion of a proposal. Previously, crown setting diamond ring was extremely popular but recently the number of people who prefer a casual design is increasing as it is designed for easy everyday use.
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Enhancement
Enhancement is a treatment to maximize a gem's original beauty and improve its potential for greater brilliance. Common enhancement methods include heating, impregnation, and filling.
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Entourage Ring
The center stone of an entourage ring is surrounded entirely by melee-sized gemstones. This design is sometimes referred to as a dinner ring.
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Epidote
Epidote crystals are named after epidosis, a Greek word that means "increasing" because one side is wider than other aspects. It is also called "pistasite" because they become green like pistachio when it contains much iron. Epidote is a mineral name, a gemstone name, and a group name of more than ten mineral species. Its durability is low and rare to find in the market.
[Moh's hardness: 6] [Mineral species: Epidote] -
Eternity Ring
Eternity ring is given to a partner on a wedding anniversary or childbirth anniversary to show eternal love and gratitude. "full eternity ring" that melee diamond is around the arm of the ring is common but sometimes "half eternity" is chosen because it is more affordable than full eternity and it can be resized.
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Euclase
Euclase has a strong cleavage nature, so it is crackable and fragile. The etymology of Euclase is "eu" meaning good and "klasis" meaning split in Greek.
[Moh's hardness: 7] [Mineral species: Euclase]
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Gemstones
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Our specialists are available to answer all inquiries.
