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Round|Lab Grown|IGI

1.51ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG770643638

Shape and cutting style on the report: Round brilliant

Certificate IGI LG770643638

Diamond specifications and retailer prices

From $449 NZD
As of November 4, 2026
Save $1,840 NZD (80%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $2,562 NZD at Brilliant Earth · As of October 16, 2026
View at Brilliant Earth

About this 1.51ct lab-grown round diamond

This 1.51ct lab-grown round sits in the one-and-a-half to two carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG770643638 or 770643638. Listed at 22 retailers as of November 4, 2026, with a 410% 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

1.51
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.1°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG770643638
Dimensions7.36 × 7.31 × 4.56 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
7.36 mm7.31 mm1.51 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG770643638
Side View
Table 56.0%Crown 35.1°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.3%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $2,562 NZD|Low: $384 NZD|High: $2,562 NZD|Avg: $1,126 NZD
Brilliant Earth
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
Retailer 18
November 6, 2026
Retailer 9$404 NZD
Retailer 16$449 NZD
Retailer 5$500 NZD
Retailer 17$500 NZD
Retailer 3$785 NZD
Retailer 6$853 NZD
Retailer 2$866 NZD
Retailer 11$913 NZD
Retailer 12$920 NZD
Retailer 4$958 NZD
Retailer 18$1,041 NZD
Retailer 14$1,317 NZD
Retailer 10$1,609 NZD
Retailer 15$1,614 NZD
Retailer 8$1,703 NZD
Retailer 13$1,999 NZD
Retailer 7$2,289 NZD
Brilliant Earth$2,562 NZD

41 data points across 18 retailers

22 retailers$449 NZD to $2,289 NZD

Retailer 1
-
$404 NZD
Price last confirmed 20 days ago
A
Retailer 2
-
$449 NZD
View
Final sale: no returns
Retailer 3
-
$464 NZD
View
Price last confirmed 25 days ago
A
Retailer 4
-
$469 NZD
View
Retailer 5
-
$500 NZD
View
Price last confirmed 13 days ago
Retailer 6
-
$500 NZD
View
Price last confirmed 22 days ago
A
Retailer 7
-
$785 NZD
View
A
Retailer 8
-
$853 NZD
View
A
Retailer 9
-
$866 NZD
View
A
Retailer 10
-
$913 NZD
View
A
Retailer 11
-
$920 NZD
View
B+
Retailer 12
-
$958 NZD
View
B+
Retailer 13
-
$1,041 NZD
View
B+
Retailer 14
-
$1,317 NZD
View
B
Retailer 15
-
$1,391 NZD
View
Retailer 16
-
$1,595 NZD
View
Price last confirmed 47 days ago
Retailer 17
-
$1,609 NZD
View
Price last confirmed 20 days ago
B
Retailer 18
-
$1,614 NZD
View
B
Retailer 19
-
$1,703 NZD
View
B
Retailer 20
-
$1,999 NZD
View
B
Retailer 21
-
$2,289 NZD
View
Most Expensive
Brilliant Earth
19882042A · Oct 16
$2,562 NZD
$1,420 USD
View
Price last confirmed 21 days ago
21 more retailers have this diamond
Prices start from $449 NZDSave up to $1,840 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
1.51ct Round
$449 NZD