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1.57ct H SI1 Round Lab Grown Diamond

EX • H/SI1 • IGI LG407939119

Shape and cutting style on the report: Round brilliant

Certificate IGI LG407939119

Diamond specifications and retailer prices

From $2,413 NZD
$1,360 USD
As of October 31, 2026
Save $7,360 NZD (75%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $9,773 NZD at MOH London · As of November 1, 2026
View at MOH London

About this 1.57ct lab-grown round diamond

This 1.57ct 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 LG407939119 or 407939119. Listed at 12 retailers as of October 31, 2026, with prices from $2,413 to $9,773, a $7,360 spread on the same certified stone. MOH London lists it at $9,773. 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

1.57
Carat
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.3°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG407939119
Dimensions7.42 × 7.38 × 4.64 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory grown diamond was created by chemical vapor deposition process (CVD) Type IIa
Top View
7.42 mm7.38 mm1.57 ctH / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG407939119
Side View
Table 54.5%Crown 36.3°Girdle: MediumPavilion 40.6°Culet: NoneDepth 62.7%

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: Oct 31
Current: $9,773 NZD|Low: $2,413 NZD|High: $9,904 NZD|Avg: $5,504 NZD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 1, 2026
Retailer 6$2,413 NZD
Retailer 5$2,951 NZD
Retailer 9$3,304 NZD
Retailer 7$3,423 NZD
Retailer 4$3,577 NZD
Retailer 10$3,726 NZD
Retailer 12$4,579 NZD
Retailer 8$5,378 NZD
Retailer 2$5,900 NZD
Retailer 11$9,408 NZD
MOH London$9,773 NZD
Retailer 3$9,795 NZD

17 data points across 12 retailers

12 retailers$2,413 NZD to $9,773 NZD

A
Cheapest Retailer
-
$2,413 NZD
$1,360 USD
B+
Retailer 2
-
$2,951 NZD
$1,663 USD
View
B+
Retailer 3
-
$3,210 NZD
$1,809 USD
View
B+
Retailer 4
-
$3,304 NZD
$1,862 USD
View
Final sale: no returns
B
Retailer 5
-
$3,423 NZD
$1,929 USD
View
Retailer 6
-
$3,423 NZD
$1,929 USD
View
Price last confirmed 19 days ago
B+
Retailer 7
-
$3,726 NZD
$2,100 USD
View
B
Retailer 8
-
$5,378 NZD
$3,031 USD
View
B
Retailer 9
-
$5,900 NZD
$3,325 USD
View
B
Retailer 10
-
$6,414 NZD
$3,615 USD
View
B
Retailer 11
-
$9,408 NZD
$5,302 USD
View
Most Expensive
B
MOH London
LG407939119 · Nov 1
$9,773 NZD
£4,337 GBP
View
11 more retailers have this diamond
Prices start from $2,413 NZDSave up to $7,360 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
1.57ct Round
$2,413 NZD