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1.51ct H SI1 Round Lab Grown Diamond

EX • H/SI1 • IGI LG12310704

Shape and cutting style on the report: Round brilliant

Certificate IGI LG12310704

Diamond specifications and retailer prices

From $580 NZD
$327 USD
As of November 1, 2026
Save $4,583 NZD (89%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $5,163 NZD at Do Amore Diamonds · As of November 2, 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG12310704 or 12310704. Listed at 19 retailers as of November 1, 2026, with prices from $580 to $5,163, a $4,583 spread on the same certified stone. Do Amore Diamonds lists it at $5,163. 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
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG12310704
Dimensions7.30 × 7.33 × 4.51 mm
L/W Ratio1.00
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
7.30 mm7.33 mm1.51 ctH / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG12310704
Side View
Table 61.0%Crown 36°Girdle: MED-UNDPavilion 41°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 1
Current: $5,163 NZD|Low: $580 NZD|High: $5,163 NZD|Avg: $1,724 NZD|+0.3%
Do Amore Diamonds
Retailer 2
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Retailer 7
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Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
November 2, 2026
Retailer 19$580 NZD
Retailer 16$674 NZD
Retailer 13$710 NZD
Retailer 6$720 NZD
Retailer 14$720 NZD
Retailer 3$829 NZD
Retailer 7$994 NZD
Retailer 8$1,180 NZD
Retailer 10$1,238 NZD
Retailer 2$1,282 NZD
Retailer 17$1,309 NZD
Retailer 11$1,431 NZD
Retailer 18$2,111 NZD
Retailer 9$2,165 NZD
Retailer 12$2,253 NZD
Retailer 5$2,555 NZD
Retailer 4$2,833 NZD
Retailer 15$3,110 NZD
Do Amore Diamonds$5,163 NZD

16 data points across 19 retailers

19 retailers$580 NZD to $5,163 NZD

A
Cheapest Retailer
-
$580 NZD
$327 USD
A
Retailer 2
-
$674 NZD
$380 USD
View
B+
Retailer 3
-
$710 NZD
$400 USD
View
A
Retailer 4
-
$720 NZD
$406 USD
View
Retailer 5
-
$720 NZD
$406 USD
View
Price last confirmed 8 days ago
A
Retailer 6
-
$829 NZD
$467 USD
View
A
Retailer 7
-
$994 NZD
$560 USD
View
Retailer 8
-
$1,180 NZD
$665 USD
View
Price last confirmed 11 days ago
A
Retailer 9
-
$1,238 NZD
$698 USD
View
A
Retailer 10
-
$1,282 NZD
£569 GBP
View
A
Retailer 11
-
$1,309 NZD
$738 USD
View
A
Retailer 12
-
$1,431 NZD
$807 USD
View
A
Retailer 13
-
$2,111 NZD
$1,190 USD
View
A
Retailer 14
-
$2,165 NZD
$1,220 USD
View
B+
Retailer 15
-
$2,253 NZD
$1,270 USD
View
B+
Retailer 16
-
$2,555 NZD
$1,440 USD
View
B+
Retailer 17
-
$2,833 NZD
$1,597 USD
View
B+
Retailer 18
-
$3,110 NZD
£1,380 GBP
View
Most Expensive
B
Do Amore Diamonds
27-03AD89E5C · Nov 2
$5,163 NZD
$2,910 USD
View
18 more retailers have this diamond
Prices start from $580 NZDSave up to $4,583 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
$580 NZD