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Round|Lab Grown|IGI

1.51ct F SI1 Round Lab Grown Diamond

EX • F/SI1 • IGI LG12251714

Shape and cutting style on the report: Round brilliant

Certificate IGI LG12251714

Diamond specifications and retailer prices

From $612 NZD
As of November 5, 2026
Save $2,661 NZD (81%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $5,430 NZD at Do Amore Diamonds · As of November 6, 2026
View at Do Amore Diamonds

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 LG12251714 or 12251714. Listed at 20 retailers as of November 1, 2026, with a 435% 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
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG12251714
Dimensions7.34 × 7.38 × 4.60 mm
L/W Ratio1.01
Cert comments
As Grown - No indications of post-growth treatment. This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process.
Top View
7.34 mm7.38 mm1.51 ctF / SI1
OriginLab Grown
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateIGI LG12251714
Side View
Table 58.0%Crown 35.5°Girdle: THN-UNDPavilion 41.6°Culet: NoneDepth 62.4%

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 5
Current: $5,430 NZD|Low: $612 NZD|High: $5,430 NZD|Avg: $1,790 NZD
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
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Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
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Retailer 17
Retailer 18
Retailer 19
Retailer 20
November 6, 2026
Retailer 4$612 NZD
Retailer 5$651 NZD
Retailer 20$711 NZD
Retailer 7$759 NZD
Retailer 19$759 NZD
Retailer 18$779 NZD
Retailer 9$1,037 NZD
Retailer 15$1,210 NZD
Retailer 14$1,245 NZD
Retailer 3$1,355 NZD
Retailer 13$1,494 NZD
Retailer 2$1,530 NZD
Retailer 12$1,530 NZD
Retailer 8$2,226 NZD
Retailer 10$2,397 NZD
Retailer 16$2,580 NZD
Retailer 6$2,693 NZD
Retailer 11$2,973 NZD
Retailer 17$3,272 NZD
Do Amore Diamonds$5,430 NZD

21 data points across 20 retailers

20 retailers$612 NZD to $3,272 NZD

A
Cheapest Retailer
-
$612 NZD
A
Retailer 2
-
$651 NZD
View
A
Retailer 3
-
$711 NZD
View
Retailer 4
-
$759 NZD
View
Price last confirmed 13 days ago
A
Retailer 5
-
$759 NZD
View
B+
Retailer 6
-
$779 NZD
View
B+
Retailer 7
-
$1,037 NZD
View
B+
Retailer 8
-
$1,210 NZD
View
B+
Retailer 9
-
$1,245 NZD
View
B
Retailer 10
-
$1,355 NZD
View
B+
Retailer 11
-
$1,494 NZD
View
B+
Retailer 12
-
$1,530 NZD
View
B
Retailer 13
-
$1,530 NZD
View
B
Retailer 14
-
$2,226 NZD
View
B
Retailer 15
-
$2,397 NZD
View
B
Retailer 16
-
$2,580 NZD
View
B
Retailer 17
-
$2,693 NZD
View
B
Retailer 18
-
$2,973 NZD
View
B
Retailer 19
-
$3,272 NZD
View
Most Expensive
Do Amore Diamonds
27-AE3F019FF · Nov 6
$5,430 NZD
$3,010 USD
View
Price under review
19 more retailers have this diamond
Prices start from $612 NZDSave up to $2,661 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
$612 NZD