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1.27ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG781608521

Shape and cutting style on the report: Round brilliant

Certificate IGI LG781608521

Diamond specifications and retailer prices

From $612 NZD
As of November 6, 2026
Save $1,058 NZD (63%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $1,670 NZD at MOH London · As of November 4, 2026
View at MOH London

About this 1.27ct lab-grown round diamond

This 1.27ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG781608521 or 781608521. Listed at 7 retailers as of November 4, 2026, with prices from $612 to $1,670, a $1,058 spread on the same certified stone. MOH London lists it at $1,670. 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

1.27
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.1°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG781608521
Dimensions6.90 × 6.93 × 4.32 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
6.90 mm6.93 mm1.27 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG781608521
Side View
Table 58.0%Crown 36.1°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 62.5%

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 6
Current: $1,670 NZD|Low: $592 NZD|High: $1,694 NZD|Avg: $964 NZD|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 2$612 NZD
Retailer 3$624 NZD
Retailer 6$751 NZD
Retailer 4$854 NZD
Retailer 5$1,067 NZD
Retailer 7$1,179 NZD
MOH London$1,670 NZD

41 data points across 7 retailers

7 retailers$612 NZD to $1,670 NZD

A
Cheapest Retailer
-
$612 NZD
A
Retailer 2
-
$624 NZD
View
A
Retailer 3
-
$751 NZD
View
B+
Retailer 4
-
$854 NZD
View
B+
Retailer 5
-
$1,067 NZD
View
B+
Retailer 6
-
$1,179 NZD
View
Most Expensive
B
MOH London
LG781608521 · Nov 4
$1,670 NZD
£739 GBP
View
6 more retailers have this diamond
Prices start from $612 NZDSave up to $1,058 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
1.27ct Round
$612 NZD