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What kind of gemstone is Emerald? The full answer is here!

Dec 25,2023 | Juyoyo

Emerald, the shimmering emerald green gemstone, is like a jewel of nature that attracts countless eyes. As one of the stars of jewelry design, Emerald has become a favorite choice for its unique color and history.

In this article, we will explore the mysterious beauty of Emerald, starting by revealing its basic information, delving into the origins of this gemstone, how it was formed, and traversing all the way to its unique place in jewelry design.


Emerald's Basic Information

Raw EmeraldEmerald Physical Properties

Color and Transparency: Emerald is known for its deep emerald green color, which is enhanced by the presence of elements such as chromium and cobalt. Transparency is demonstrated by Emerald's ability to allow light to penetrate, and the presence of tiny fibers and bubbles can lead to an "angel hair" effect, further adding to its unique luster.

Hardness: Emerald has a Mohs hardness of approximately 7.5-8, indicating that it is relatively hard for daily wear and care. Despite its hardness, Emerald needs to be cared for carefully to prevent scratches compared to some other gemstones.

Refractive Index:The refractive index of an emerald is usually between 1.565 and 1.602, which is determined by measuring the angle of refraction at which light passes through the emerald. The high refractive index gives the emerald an excellent luminous effect, making it look stunning in the light.

Birefringence: Emerald's birefringence is typically between 0.006 and 0.010. This means that Emerald is able to split light in two, creating some double image effects that add to its special appearance.

Luster: Emerald's glassy luster gives its surface a unique brightness. This luster is the result of a combination of Emerald's structure and refractive effects, which give it a striking glow under varying light conditions.

Emerald Chemical Composition

Emerald's chemical composition consists primarily of the elements beryllium (Be), aluminum (Al), silicon (Si), oxygen (O) and chromium (Cr). Its chemical formula is Be3Al2(SiO3)6, and this unique combination gives Emerald its characteristic physical and chemical properties, creating its distinctive emerald green color.The crystal structure of Emerald belongs to the group of minerals known as bezierite silicates, which are hexagonal columnar crystals. This structure not only affects Emerald's physical properties, but also plays a key role in its optical properties, giving it a striking effect in the light.


Emerald Origin and Formation Process

Emerald Origin

Colombian Emerald is known around the world for its deep green color, exceptional clarity and unique hue. Emerald here has a deep, pure green color due to its unique mineral-producing environment and rich chromium content.

Zambian Emerald is revered for its deep green color and exceptional clarity, and is often considered the material of choice for fine jewelry design. Zambian Emerald stands out for its deep color and exceptional clarity.

Brazilian Emerald is favored for its distinctive green color and excellent clarity, and performs especially well in medium to large stones. Brazilian Emerald usually exhibits a mesmerizing green color, making it ideal for fine jewelry.

OTHER ORIGINS: In addition to the three main origins mentioned above, Emerald is also produced in Zimbabwe, Egypt, and India, each of which has unique regional characteristics and properties.

Process of Formation

The formation of Emerald is closely related to the action of metamorphic rocks and hydrothermal fluids deep within the Earth. Near plate boundaries, minerals in magma gradually crystallize at high temperatures and pressures to form Emerald crystals. Hydrothermal fluid action and the presence of elements such as chromium influence the color and appearance of Emerald, giving it a unique aesthetic.


Emerald vs Diamond

  Raw Emerald Diamond
Color Emerald is usually green in color, sometimes with other shades. Diamonds are usually colorless, but other colored variants are also available
Durometer Emerald is soft, with a hardness of about 7.5-8 Diamond is the hardest mineral on earth, with a hardness of 10
Index of Refraction The refractive index of Emerald is about 1.58 - 1.60 Diamonds have a refractive index of about 2.42
Birefringence Emerald has a birefringence of about 0.006 to 0.010 Diamonds have a birefringence of approximately 0.043
Prices The price of Emerald varies according to its quality and color Diamonds are usually more expensive than emeralds, depending on factors such as their cut, color, purity and carat size

Emeralds and diamonds differ significantly in color, hardness, price and optical properties. Emeralds are usually green in color, relatively soft, more affordable, and exhibit some birefringence. In contrast, diamonds are usually colorless, extremely hard, more expensive and show birefringence. The choice should take into account personal preference, usage and budget.


How to Recognize Emerald's Quality

The quality of Emerald is evaluated based on its color, clarity, cut and origin. The darker and more saturated the color of the Emerald, the more desirable it tends to be. In terms of transparency, a quality Emerald should exhibit good clarity, allowing light to pass through freely. The cut of the Emerald determines how well it reflects and refracts light, further affecting its visual appeal.


A quality Emerald usually has a bright, full emerald green color without excessive brown or gray. The color should be pure and striking.Emerald also excels in transparency. Avoid stones with too many inclusions or cloudiness, as this can detract from their appearance and value.


Natural Inclusions: Natural inclusions are a natural characteristic of Emerald, but excessive inclusions may affect its clarity and beauty. Choose stones where the inclusions are unobtrusive or located at the edge of the stone.

Patterns and Textures: A good quality Emerald will often exhibit unique patterns and textures that are the result of its natural formation process. These features add to the personality of the gemstone.


Proportion and Symmetry: A quality cut should maintain the Emerald's proportions and symmetry to give it the best optical appearance. Irregular cuts may detract from the sparkle of the stone.

Brilliance: Look closely at Emerald's cut for good brilliance and sparkle. Brilliance is an important indicator of a gemstone's quality.

Hardness and Durability

Surface Wear: Evaluate the surface of the Emerald for excessive scratches or wear. Even though Emerald is relatively hard, care should be taken to avoid collisions with hard objects.

Edges and corners: A quality Emerald should have crisp edges and corners with no visible wear or bumps.



In this article, we take an in-depth look at the fascinating gemstone of Emerald, covering basic information, its origin and formation, comparisons to diamonds, and an important guide on how to recognize its qualities!

Emerald is prized for its distinctive deep green color, its diverse origins, its complex formation process, and its aesthetics, which are quite different from those of diamonds. Whether used in jewelry design or as a precious stone, Emerald exudes the vibrancy of nature and the mystical brilliance of gemstones.

The beauty of Emerald is undeniably unique, and Juyoyo is committed to providing you with high quality, authentic Emerald rings. Choosing Juyoyo means that you'll not only get Emerald that stands up to the test of time, but you'll also get to experience the unique design of the jewelry. Whether you're looking for a unique wedding ring, engagement ring, or desire a custom piece of jewelry, Juyoyo can satisfy your discerning jewelry needs.

Let Juyoyo be your trusted partner in creating a one-of-a-kind gemstone journey when you choose Emerald. Experience Juyoyo's unique understanding of Emerald and passion for jewelry, and let each gemstone carry precious memories and deep emotions.

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