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1.25ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG805675956

Shape and cutting style on the report: Round brilliant

Certificate IGI LG805675956

Diamond specifications and retailer prices

From $632 NZD
As of November 5, 2026
Save $1,054 NZD (63%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $1,685 NZD at MOH London · As of November 4, 2026
View at MOH London

About this 1.25ct lab-grown round diamond

This 1.25ct 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 LG805675956 or 805675956. Listed at 8 retailers as of November 4, 2026, with prices from $632 to $1,685, a $1,054 spread on the same certified stone. MOH London lists it at $1,685. 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

1.25
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG805675956
Dimensions6.92 × 6.88 × 4.24 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.92 mm6.88 mm1.25 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG805675956
Side View
Table 57.0%Crown 34.9°Girdle: MediumPavilion 40.5°Culet: NoneDepth 61.4%

Caratlytics Score

How it works →
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: $1,685 NZD|Low: $605 NZD|High: $1,699 NZD|Avg: $928 NZD|-0.8%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 5, 2026
Retailer 2$632 NZD
Retailer 4$644 NZD
Retailer 7$651 NZD
Retailer 6$706 NZD
Retailer 3$712 NZD
Retailer 8$1,067 NZD
Retailer 5$1,227 NZD
MOH London$1,685 NZD

19 data points across 8 retailers

8 retailers$632 NZD to $1,685 NZD

A
Cheapest Retailer
-
$632 NZD
A
Retailer 2
-
$644 NZD
View
B+
Retailer 3
-
$651 NZD
View
A
Retailer 4
-
$706 NZD
View
A
Retailer 5
-
$712 NZD
View
B
Retailer 6
-
$1,067 NZD
View
B
Retailer 7
-
$1,227 NZD
View
Most Expensive
B
MOH London
LG805675956 · Nov 4
$1,685 NZD
£746 GBP
View
7 more retailers have this diamond
Prices start from $632 NZDSave up to $1,054 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
1.25ct Round
$632 NZD