Natural Diamond - 0.45ct Round Brilliant (GWLAB Certified)

Name: Natural Diamond - 0.45ct Round Brilliant (GWLAB Certified)
Brand: The Collector
Availability: LimitedAvailability

A round brilliant cut diamond sealed in a GWLAB blister pack, showing certificate number 245509331032 and F color VS2 clarity specs. - view 1

1/3

Estimated value

$750 - $1,100

Rarity

Ordinary(3/10)

NATURAL DIAMOND - 0.45CT ROUND BRILLIANT (GWLAB CERTIFIED): IDENTIFICATION

A loose, colorless gemstone identified as a round brilliant cut diamond weighing 0.45 carats. The specimen is secured within a tamper-evident thermal-sealed blister pack issued by GWLAB (Gemewizard Laboratory), bearing certificate number 245509331032. The stone exhibits high-frequency light return characteristic of the brilliant faceting pattern, with a stated dimensions of 4.69 x 4.62 x 3.08 mm. The certification labels the stone as F color and VS2 clarity.

Compare with other gemstones in the archive: 0.50 Carat Round Brilliant Diamond (AIG D2410518829), Natural Tanzanite - 4.51ct Pear Cut (IGE Certified), Natural Amethyst Geode Cathedral - Brazilian Origin.

GEOLOGICAL ORIGIN

The round brilliant cut, standardized in 1919 by Marcel Tolkowsky, remains the dominant faceting style for diamonds globally because of its optimized optical physics for light dispersion. GWLAB is a commercial gemological laboratory established to provide digital and physical grading services, particularly focusing on the integration of the Gemewizard color communication system which was developed in the early 2000s to standardize colored stone nomenclature.

SCARCITY

Ordinary40-55%

CommonLegendary

Standard antiques commonly found at estate sales and flea markets. Plentiful supply meets modest demand.

Rarity 3/10. Curiosa currently catalogues 15 gemstones items at rarity 3 or higher.

Typical Characteristics

Moderate production runs
Common at estate sales
Entry-level collectibles

Confidence Factors

Security seal is intact on the blister packaging
Certificate number matches laboratory branding but is from a secondary-tier lab compared to GIA
Physical dimensions (4.69mm) are consistent with the 0.45ct weight

How does authenticity detection work?

GEMOLOGIST'S TAKE

Gemologist & Mineral Specialist

Gemologist

Identification is highly confident due to clear laboratory packaging and printed specifications consistent with the visual appearance of the stone.

KEY EVIDENCE

1Verified GWLAB seal and certificate information dated 28 May 2024
2Optical performance consistent with diamond refractive index
3Dimensions 4.69 x 4.62 x 3.08 mm correctly correspond to a ~0.45ct mass
4F/VS2 specifications are standard commercial-grade high-quality parameters

UNCERTAINTIES

•GWLAB is considered a 'soft' laboratory compared to the GIA; color or clarity might be graded 1-2 degrees stricter by top-tier labs

WHAT WOULD IMPROVE CERTAINTY

→Verify certificate number on the official GWLAB website database
→Check for laser inscription on the diamond's girdle using a 20x loupe
→Subject the stone to a UV fluorescence test to check for secondary value drivers

CONDITION & GRADE

F / VS2

Grading breakdown

The grade is assigned by GWLAB; F color is 'colorless' (second highest category), and VS2 (Very Slightly Included 2) suggests inclusions are difficult to see under 10x magnification.

Condition

The item is in 'sealed as new' condition within the laboratory blister pack. The packaging shows minor superficial scuffing but the seal remains intact with no evidence of tampering.

GEMSTONE VALUATION

$750 - $1,100

Updated: May 11, 2026

Who buys this

Private consumers seeking engagement stones and retail jewelers looking for certified loose inventory.

What increases value

•The 'F' color rating places it in the high-demand colorless range
•Sealed condition ensures grading integrity for resale
•Round brilliant shape is the most liquid cut in the global market

What lowers value

•Secondary lab certification often trades at a 15-30% discount compared to GIA certified stones
•Weight under the 0.50ct threshold reduces the 'per-carat' price jump