Carat in relation to Gold is a measurement of Quality.

• 24 Carat Gold is 100% pure yellow gold.
• 18 Carat Yellow Gold is 75% pure YW gold plus 25% cooper and silver alloy.
• 18 Carat White Gold is 75% pure YW gold plus 25% palladium and silver alloy.

Carat in relation to gemstones is the measurement of their weight.

• 1 Gram = 5 Carats.
• 1 Carat = is further subdivided into 100 points.

Cut refers to the symmetry, proportions, and polish of an Emerald, greatly influencing its color, brilliance, visibility of inclusions, weight retention, and overall beauty.

The shape of an Emerald depends largely on the form of the original rough crystal. Each stone is individually fashioned according to its natural characteristics, as well as the cutter's experience and interpretation.

The Oval Cut is an elongated, rounded shape with balanced proportions and brilliant facets that create a graceful, elegant appearance while maximizing the stone’s visual size.

• Color: Lee Wasson subjectively classifies Colombian Emeralds into 3 hues of green; Herb Green, Blue Green, Yellow Green.
• Tone: Is the depth of each hue Lee Wasson subjectively grades from (1) lightest to (10) darkest.

Every Colombian Emerald´s color is unique, its evaluation is subjective and requires years of experience, continuous viewing and comparison.

Inclusions are flaws and or foreign material inside Emeralds crystalline structure.
Lee Wasson subjectively estimates the quantity of inclusions, as:

• (*) Free of Inclusions.
• (*) Lightly Included 1 to 3.
• (*) Moderately Included 1 to 3.
• ( ) Highly Included 1 to 3.
• (*) Asterisk denotes desirability.

Every Inclusion in Colombian Emeralds are unique their quantification is subjective and requires years of experience, continuous viewing and comparison.

Lee Wasson subjetively determines as the approx. % of light returned to the observer as result of internal reflections.
Window: The approx. % of light that leaks through the bottom or sides of the stone.
Extintion: The approx. % of dark areas in the stone.
Every Colombian Emerald is tailor cut to its individual needs. Evaluation is subjective and requires years of experience, continuous viewing and comparison.

• Colombia
• Brazil
• Sandawana
• Afganistan
• Russia
• India
• Pakistan
• North Carolina
• Zambia

Muzo Emeralds are celebrated for their rich green color, the color many people picture when they think of a fine Colombian Emerald. Fine examples combine attractive crystal, luxurious depth, and the classic beauty that has made Muzo the world’s most famous emerald mine.

Are flaws and or foreign material inside Emeralds crystalline structure.
Lee Wasson subjectively estimates the quantity of inclusions, as :

• (*) Free of Inclusions.
• (*) Lightly Included 1 to 3.
• (*) Moderately Included 1 to 3.
• (  ) Highly Included 1 to 3
• (*) Asterisk denotes desirability.

Types of Inclusions:
Three Phase inclusions consist of a gas, liquid and a crystal enclosed inside the stone.
Pirite, Calcite, Quartz, Parisite, Albite, Dolomite, Shale are also found and are conclusive evidence of natural origin.
Every Inclusion in Colombian Emeralds are unique, their quantification is subjective and requires years of experience, continuous viewing and comparison.

Occurring naturaly in nature.

Man made materials with the same physical, optical and chemical properties of it´s natural counterpart.

Lee Wasson identifies surface reaching inclusions susceptible to enhancement and subjectively quantifies the amount of treatment received, as :

• (*) None.
• (*) Minor.
• (*) Moderate.
• (  ) Significant.
• (*) Asterisk denotes desirability.

Clarity enhancement is always present unless specified.
The Colombian Emerald contains surface reaching inclusions routinely filled with colourless oils or permanent epoxy resins to diminish or dissimulate the visibility of inclusions and permit the passage of light throught the stone.

Carat in relation to Gemstones is the measurement of their Weight.

• 1 Gram = 5 Carats.
• 1 Carat is further subdivided into 100 points.