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.

Talisman with Embrald and Moonstones Necklace

Designer: Lori Swartz

Tags

Shipping Date

Shipping Date

More in this Collection

Vario Clasp Moonstone and Pink Tourmaline 18K yellow gold

Marcel Roelofs

Pompei Ring with Rainbow Moonstone

Lika Behar

Moonstone Droplet Pendant

Jenny Reeves

Moonstone Leverback Drops

Jenny Reeves

Short curved silver wiggly pendant with blue topaz & 18ct gold bead

Paul Finch

Moonstone Candy Earrings

Lika Behar

14k Gold Cabochon 4 mm Natural Rainbow Moonstone Bezel-Set Solitaire Stud Earrings

Lireille

SUNBURST Drops Earrings - Moonstone

Jenny Reeves

Sunburst Pendant with 5 mm Moonstone - Small

Jenny Reeves

Sunset Pendant - Small - 5 mm Blue Moonstone

Jenny Reeves

Queen Bee Pendant in Fine Silver & 14k Yellow Gold - Roller Printed, Hand Sawen, Fabricated & Metal Pendant

Judith Hoff Brooks

14K Gold 3-strand Multi-gemstone Bracelet

Lireille

Sunburst Pendant with 6 mm Moonstone - Large

Jenny Reeves

Pinnacle Leaf Pendant with Moonstone

Jenny Reeves

Redwood Drops Earrings with Moonstone

Jenny Reeves

Engravable Four-Sided Vertical Bar Necklace

Lireille

Fus Gox Bracelet

Lika Behar

Deck Ring

Lika Behar

My World Ring Aquaprase and Cognac Diamonds

Lika Behar

Rajasthan Moonstone Ring

Lika Behar

Rajasthan Moonstone and Diamond Ring

Lika Behar

Laced Section Necklace

Lori Swartz

Chevron Shape Mixed Metal Band

Jenny Reeves

Bedrock Chevron Shape Moonstone Ring

Jenny Reeves

14K Gold Beaded Disc Necklace

Lireille

18k Gold and Silver Open Wrap Family Ring for Ryan and Emma

Shimara Carlow

Moondance Moonstone, Labradorite, and Diamond Cuff

Lika Behar

14K Gold 3mm Round Citrine-Set Ring

Lireille

Long curved wiggly pendant with blue topaz & 18K gold detail

Paul Finch

Black Light Earrings

Annie Tung

Wasp Nest with Citrine on Hook

Lori Swartz

Curving Silver Wiggly Ring with Blue Topaz

Paul Finch

Silver spiral wiggly ring with blue topaz & 18K gold detail

Paul Finch

Small Curved Silver Wiggly Pendant with Blue Topaz & 18ct Gold Bead

Paul Finch

Short Silver Wiggly Drops with Blue Topaz

Paul Finch

Long Silver Wiggly Drop Earrings with Blue Topaz

Paul Finch

Tapering Silver Wiggly Ring with Blue Topaz

Paul Finch