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Round|Lab Grown|IGI

5.51ct G VS2 Round Lab Grown Diamond

EX • G/VS2 • IGI LG728578074

Shape and cutting style on the report: Round brilliant

Certificate IGI LG728578074

Diamond specifications and retailer prices

From $2,191 NZD
$1,235 USD
As of November 1, 2026
Save $3,816 NZD (64%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $6,521 NZD at Rare Carat · As of October 21, 2026
View at Rare Carat

About this 5.51ct lab-grown round diamond

This 5.51ct lab-grown round sits in the over five carat band, graded G colour (near-colourless) and VS2 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG728578074 or 728578074. Listed at 7 retailers as of November 1, 2026, with a 174% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

5.51
Carat
G
Colour
VS2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG728578074
Dimensions11.55 × 11.49 × 6.78 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.55 mm11.49 mm5.51 ctG / VS2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG728578074
Side View
Table 62.0%Crown 34.9°Girdle: MediumPavilion 40.5°Culet: NoneDepth 58.9%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $6,521 NZD|Low: $2,152 NZD|High: $6,994 NZD|Avg: $4,016 NZD|-6.8%
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 1, 2026
Retailer 4$2,191 NZD
Retailer 5$2,236 NZD
Retailer 3$2,428 NZD
Retailer 7$3,502 NZD
Retailer 6$5,275 NZD
Retailer 2$6,007 NZD
Rare Carat$6,521 NZD

41 data points across 7 retailers

7 retailers$2,191 NZD to $6,007 NZD

B+
Cheapest Retailer
-
$2,191 NZD
$1,235 USD
A
Retailer 2
-
$2,236 NZD
$1,260 USD
View
A
Retailer 3
-
$2,428 NZD
£1,077 GBP
View
B+
Retailer 4
-
$3,502 NZD
$1,974 USD
View
B
Retailer 5
-
$5,275 NZD
$2,973 USD
View
B
Retailer 6
-
$6,007 NZD
£2,666 GBP
View
Most Expensive
Rare Carat
1713-7_l_728578074 · Oct 21
$6,521 NZD
$3,675 USD
View
Price last confirmed 11 days ago
6 more retailers have this diamond
Prices start from $2,191 NZDSave up to $3,816 NZD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
5.51ct Round
$2,191 NZD