May birthstone is Emerald. Emerald is a precious gemstone and a variety of the mineral beryl 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.

Emeralds, like all colored gemstones, are graded using four basic parameters–the four Cs of connoisseurship: color, clarity, cut and carat weight. Normally, in the grading of colored gemstones, color is by far the most important criterion. However, in the grading of emeralds, clarity is considered a close second. A fine emerald must possess not only a pure verdant green hue as described below, but also a high degree of transparencyto be considered a top gem.

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".

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. In addition, a fine emerald will be saturated and have a hue that is bright (vivid).

Emeralds tend to have numerous inclusions and surface breaking fissures. Unlike diamonds, where the loupe standard, i.e. 10× magnification, is used to grade clarity, emeralds are graded by eye. Thus, if an emerald has no visible inclusions to the eye (assuming normal visual acuity) it is considered flawless. Stones that lack surface breaking fissures are extremely rare and therefore almost all emeralds are treated ("oiled", see below) to enhance the apparent clarity. Other treatments, for example the use of green-tinted oil, are not acceptable in the trade. The relative non-uniformity motivates the cutting of emeralds in cabochon form, rather than faceted shapes. Faceted emeralds are most commonly given an oval cut, or the signature emerald cut, a rectangular cut with facets around the top edge.

Lika Behar Sarah Necklace

Designer: Lika Behar

Tags

Shipping Date

Shipping Date

More in this Collection

14k Gold Natural Diamond 5-Station Necklace

Lireille

Sterling Silver Antiqued Textured Band

Lireille

Sterling Silver with 14K Accent Antiqued Round Bezel Garnet Ring

Interworld Designs

Redwood Moonstone Pendant

Jenny Reeves

Seafoam Band – Turquoise

Jenny Reeves

Small Redwood Ring – Gold

Jenny Reeves

Redwood Slice Pendant – Gold

Jenny Reeves

Large Redwood Turquoise Pendant

Jenny Reeves

Small Sunburst Opal Pendant

Jenny Reeves

Chrysocolla Gold & Silver Drops

Jenny Reeves

Pompeii Hoops - Small - 3/4"

Jenny Reeves

Tiny Terra Pendant

Jenny Reeves

Tiny Terra Drops

Jenny Reeves

Tiny Erosion Studs - Bright

Jenny Reeves

Redwood Drops - Turquoise

Jenny Reeves

Tiny Redwood Studs: Sparkling Tree Slice Diamond Earrings

Jenny Reeves

14K Gold 1 1/2 CTW Diamond Stud Earrings

Lireille

14K Gold Satin Finish Black Pear Diamond Confetti Signet Ring

Lireille

Love Necklace – Silver with 18K Gold Finish

Jorge Revilla

14k Gold Lab Grown Diamond 9-Station Necklace

Lireille

14K Gold 3 MM Square Small Cube Post Earrings

Interworld Designs

14k Gold 1.5 mm Wide Diamond Pattern Band

Lireille

Platinum 9x7 mm Oval Lightweight 4-Solitaire Engagement Ring with Lab-Emerald

Lireille

MIA Oval Pendant – 18k Gold Vermeil

Jorge Revilla

MIA Collection Oval Earrings – 18k Gold Vermeil

Jorge Revilla

NOVA Collection Bracelet – 18k Gold Vermeil on Sterling Silver 925

Jorge Revilla

NOVA Silver Necklace with 18k Gold Vermeil

Jorge Revilla

NOVA Necklace – Silver & Gold Vermeil

Jorge Revilla

14k Rose Gold Ring with Five Rose Cut Pink Sapphires

Shimara Carlow

NOVA 23mm Earrings – Silver & 18k Gold Vermeil

Jorge Revilla

My World 24K Aquaprase Ring

Lika Behar

NOVA 18k Vermeil Silver Earrings

Jorge Revilla

PORTOFINO 24K Gold & Prasiolite Ring

Lika Behar

ODYSSEY Sterling Silver Necklace with Rhodium Plating

Jorge Revilla

ODYSSEY Necklace in Silver with 18k Gold Vermeil

Jorge Revilla

MOONDANCE Ring - Crystal Quartz & MOP Doublet

Lika Behar

PRIZMIC ‘HAPPY’ Ring - Multicolor Sapphire

Lika Behar