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1.23ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG759507271

Shape and cutting style on the report: Round brilliant

Certificate IGI LG759507271

Diamond specifications and retailer prices

From $350 NZD
As of November 5, 2026
Save $1,755 NZD (83%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $2,105 NZD at Reve Diamonds · As of November 6, 2026
View at Reve Diamonds

About this 1.23ct lab-grown round diamond

This 1.23ct lab-grown round sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG759507271 or 759507271. Listed at 21 retailers as of November 5, 2026, with prices from $350 to $2,105, a $1,755 spread on the same certified stone. Reve Diamonds lists it at $2,105. 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

1.23
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.7°
Pavilion angle41.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG759507271
Dimensions6.91 × 6.88 × 4.21 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
6.91 mm6.88 mm1.23 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG759507271
Side View
Table 60.0%Crown 33.7°Girdle: MediumPavilion 41.4°Culet: NoneDepth 61.0%

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 5
Current: $852 NZD|Low: $347 NZD|High: $2,105 NZD|Avg: $950 NZD|-0.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Reve Diamonds
November 6, 2026
Retailer 7$350 NZD
Retailer 5$391 NZD
Retailer 15$406 NZD
Retailer 2$434 NZD
Retailer 3$434 NZD
Retailer 4$754 NZD
Retailer 10$779 NZD
Retailer 9$824 NZD
Retailer 1$852 NZD
Retailer 16$872 NZD
Retailer 14$934 NZD
Retailer 11$1,156 NZD
Retailer 8$1,396 NZD
Retailer 13$1,400 NZD
Retailer 6$1,491 NZD
Retailer 12$2,023 NZD
Reve Diamonds$2,105 NZD

33 data points across 17 retailers

21 retailers$350 NZD to $2,105 NZD

A
Cheapest Retailer
-
$350 NZD
A
Retailer 2
-
$391 NZD
View
Final sale: no returns
A
Retailer 3
-
$406 NZD
View
Retailer 4
-
$434 NZD
View
Price last confirmed 12 days ago
A
Retailer 5
-
$434 NZD
View
B+
Retailer 6
-
$708 NZD
View
B+
Retailer 7
-
$754 NZD
View
B+
Retailer 8
-
$779 NZD
View
B+
Retailer 9
-
$824 NZD
View
B+
Retailer 10
-
$852 NZD
View
B+
Retailer 11
-
$872 NZD
View
B+
Retailer 12
-
$872 NZD
View
B+
Retailer 13
-
$934 NZD
View
B
Retailer 14
-
$1,156 NZD
View
B
Retailer 15
-
$1,187 NZD
View
Retailer 16
-
$1,384 NZD
View
Price last confirmed 46 days ago
B
Retailer 17
-
$1,396 NZD
View
B
Retailer 18
-
$1,400 NZD
View
B
Retailer 19
-
$1,491 NZD
View
B
Retailer 20
-
$2,023 NZD
View
Most Expensive
B
Reve Diamonds
932605E8E · Nov 6
$2,105 NZD
$1,183 USD
View
20 more retailers have this diamond
Prices start from $350 NZDSave up to $1,755 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
1.23ct Round
$350 NZD