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Oval|Lab Grown|IGI

1.57ct G SI1 Oval Lab Grown Diamond

ID • G/SI1 • IGI LG778614306

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG778614306

Diamond specifications and retailer prices

From $678 NZD
$382 USD
As of November 1, 2026
Save $1,558 NZD (70%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $2,236 NZD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.57ct lab-grown oval diamond

This 1.57ct lab-grown oval sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG778614306 or 778614306. Listed at 7 retailers as of October 31, 2026, with prices from $678 to $2,236, a $1,558 spread on the same certified stone. Brilliant Earth lists it at $2,236. 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
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle39.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG778614306
Dimensions9.30 × 6.47 × 4.00 mm
L/W Ratio1.44
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.30 mm6.47 mm1.57 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG778614306
Side View
Table 61.0%Crown 35.5°Girdle: MED-THKPavilion 39.8°Culet: NoneDepth 61.8%

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 1
Current: $2,236 NZD|Low: $648 NZD|High: $2,892 NZD|Avg: $1,344 NZD|-22.7%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 1, 2026
Retailer 4$678 NZD
Retailer 3$913 NZD
Retailer 6$923 NZD
Retailer 2$944 NZD
Retailer 7$1,716 NZD
Retailer 5$2,035 NZD
Brilliant Earth$2,236 NZD

40 data points across 7 retailers

7 retailers$678 NZD to $2,236 NZD

B+
Cheapest Retailer
-
$678 NZD
$382 USD
A
Retailer 2
-
$913 NZD
€490 EUR
View
A
Retailer 3
-
$923 NZD
$520 USD
View
A
Retailer 4
-
$944 NZD
£419 GBP
View
B
Retailer 5
-
$1,716 NZD
$967 USD
View
B
Retailer 6
-
$2,035 NZD
£903 GBP
View
Most Expensive
B
Brilliant Earth
21027109A · Oct 31
$2,236 NZD
$1,260 USD
View
6 more retailers have this diamond
Prices start from $678 NZDSave up to $1,558 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 Oval
$678 NZD