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Round|Lab Grown|IGI

1.31ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG771657198

Shape and cutting style on the report: Round brilliant

Certificate IGI LG771657198

Diamond specifications and retailer prices

From $473 NZD
As of November 6, 2026
Save $610 NZD (56%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $1,905 NZD at Reve Diamonds · As of October 25, 2026
View at Reve Diamonds

About this 1.31ct lab-grown round diamond

This 1.31ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG771657198 or 771657198. Listed at 17 retailers as of November 5, 2026, with a 129% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.31
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.3°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG771657198
Dimensions7.05 × 7.02 × 4.33 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.05 mm7.02 mm1.31 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG771657198
Side View
Table 58.0%Crown 33.3°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 61.6%

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 6
Current: $601 NZD|Low: $276 NZD|High: $2,097 NZD|Avg: $871 NZD|-18.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Reve Diamonds
November 6, 2026
Retailer 6$283 NZD
Retailer 7$316 NZD
Retailer 15$328 NZD
Retailer 5$352 NZD
Retailer 9$473 NZD
Retailer 1$601 NZD
Retailer 16$612 NZD
Retailer 17$617 NZD
Retailer 14$776 NZD
Retailer 12$893 NZD
Retailer 13$934 NZD
Retailer 11$938 NZD
Retailer 4$945 NZD
Retailer 10$1,082 NZD
Retailer 3$1,129 NZD
Retailer 8$1,227 NZD
Retailer 2$1,642 NZD
Reve Diamonds$1,905 NZD

39 data points across 18 retailers

17 retailers$473 NZD to $1,082 NZD

Retailer 1
-
$283 NZD
Price last confirmed 12 days ago
Retailer 2
-
$328 NZD
View
Price last confirmed 8 days ago
Retailer 3
-
$352 NZD
View
Price last confirmed 11 days ago
B+
Retailer 4
-
$473 NZD
View
A
Retailer 5
-
$601 NZD
View
Retailer 6
-
$612 NZD
View
Price last confirmed 10 days ago
A
Retailer 7
-
$776 NZD
View
Retailer 8
-
$875 NZD
View
Price last confirmed 17 days ago
A
Retailer 9
-
$893 NZD
View
B+
Retailer 10
-
$934 NZD
View
B+
Retailer 11
-
$938 NZD
View
Retailer 12
-
$945 NZD
View
Price last confirmed 12 days ago
B+
Retailer 13
-
$1,082 NZD
View
Retailer 14
-
$1,129 NZD
View
Price last confirmed 14 days ago
Retailer 15
-
$1,227 NZD
View
Price last confirmed 11 days ago
Retailer 16
-
$1,642 NZD
View
Price last confirmed 12 days ago
Most Expensive
Reve Diamonds
1E17ECC5F · Oct 25
$1,905 NZD
$1,056 USD
View
Price last confirmed 12 days ago
16 more retailers have this diamond
Prices start from $473 NZDSave up to $610 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
1.31ct Round
$473 NZD