Description
Technical Specifications – Natural Emerald
-
Gem Type / Mineral Species: Natural Emerald (variety of Beryl – Be₃Al₂Si₆O₁₈), colored primarily by chromium (Cr) and/or vanadium (V), consistent with Swat Valley material.
-
Carat Weight: 3.19 ct
-
Cut / Shape: Cushion cut – rectangular with rounded corners, faceted to optimize light return.
-
Dimensions: 10.08 mm (length) × 7.74 mm (width) × 5.66 mm (depth) → Length-to-width ratio: ≈1.30:1 (balanced proportions for cushion cut). → Depth percentage: ≈73% (provides adequate pavilion depth for brilliance).
-
Color: Vibrant spring green (medium to medium-dark tone, high saturation), typical of Swat Valley emeralds with strong, even green hue.
-
Clarity: Transparent; very good luster (high surface reflection and internal brightness). Features slight natural inclusions (typical jardin: fractures, needles, fluid inclusions), which are characteristic of natural emeralds and contribute to uniqueness. Inclusions are minimal and do not significantly impact overall transparency.
-
Origin: Pakistan – Swat Valley (likely Mingora or nearby areas). Swat emeralds commonly exhibit bright, saturated green color, good transparency in faceted form, and distinctive inclusions such as partially healed fissures and multi-phase fluids.
-
Treatment / Enhancement: Minor oil treatment (clarity enhancement) – colorless oil introduced into surface-reaching fractures to improve apparent clarity and enhance color vibrancy/brilliance. This is a standard, temporary, and reversible process for emeralds.
-
Certification: GSI (Gemological Science International) report no. 73054350108 – verifies natural origin, weight, measurements, color, minor oil treatment, and quality parameters.
-
Optical Properties: Very good luster and brilliance; cushion cut enhances light performance from multiple angles. Refractive index and specific gravity align with standard emerald ranges (RI ≈1.57–1.59, SG ≈2.72).
-
Additional Notes:
- Ethically sourced (as stated in documentation).
- Natural inclusions confirm authenticity and differentiate from synthetics or heavily treated material.
- Suitable for jewelry use (e.g., center stone in rings, pendants, or earrings); 3+ ct size is in the upper-mid range for Swat emeralds.
Summary Assessment This 3.19 ct Swat-origin cushion emerald displays transparent clarity with very good luster, vibrant spring green color, balanced proportions, and minor oil enhancement. It is fully certified and representative of high-quality Pakistani material, with natural character from slight inclusions.
For care: Avoid ultrasonic or steam cleaning due to the oil treatment; use warm soapy water and a soft brush for gentle cleaning. Re-oiling by a professional may be needed over time to maintain optimal appearance.
