Round|Lab Grown|GIA

1.23ct D SI1 Round Lab Grown Diamond

EX • D/SI1 • GIA 6452332073

Certificate GIA 6452332073

Diamond specifications and retailer prices

From £195 GBP
As of November 4, 2026
Save £668 GBP (77%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £862 GBP at MOH London · As of November 5, 2026
View at MOH London

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 GIA 6452332073. Listed at 17 retailers as of November 4, 2026, with prices from £195 to £862, a £668 spread on the same certified stone. MOH London lists it at £862. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle40.8°
OriginLab Grown
Grading LabGIA
CertificateGIA 6452332073
Dimensions6.89 × 6.85 × 4.25 mm
L/W Ratio1.01
Star length45%
Lower girdle75%
Top View
6.89 mm6.85 mm1.23 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6452332073
Side View
Table 55.0%Crown 34.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 61.9%

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 4
Current: £862 GBP|Low: £195 GBP|High: £888 GBP|Avg: £436 GBP|-2.9%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 6, 2026
Retailer 8£195 GBP
Retailer 13£238 GBP
Retailer 6£345 GBP
Retailer 11£360 GBP
Retailer 7£361 GBP
Retailer 9£365 GBP
Retailer 3£375 GBP
Retailer 5£396 GBP
Retailer 2£424 GBP
Retailer 12£433 GBP
Retailer 10£572 GBP
Retailer 4£580 GBP
MOH London£862 GBP

43 data points across 13 retailers

17 retailers£195 GBP to £862 GBP

Retailer 1
-
£175 GBP
Price last confirmed 27 days ago
A
Retailer 2
-
£195 GBP
View
Final sale: no returns
Retailer 3
-
£204 GBP
View
Price last confirmed 24 days ago
Retailer 4
-
£218 GBP
View
Price last confirmed 35 days ago
A
Retailer 5
-
£238 GBP
View
B+
Retailer 6
-
£345 GBP
View
B+
Retailer 7
-
£360 GBP
View
B+
Retailer 8
-
£361 GBP
View
B+
Retailer 9
-
£365 GBP
View
Retailer 10
-
£375 GBP
View
Price last confirmed 16 days ago
Retailer 11
-
£396 GBP
View
Price last confirmed 11 days ago
B+
Retailer 12
-
£424 GBP
View
B+
Retailer 13
-
£433 GBP
View
B
Retailer 14
-
£572 GBP
View
Retailer 15
-
£580 GBP
View
Price last confirmed 27 days ago
Retailer 16
-
£699 GBP
View
Price last confirmed 34 days ago
Most Expensive
B
MOH London
6452332073 · Nov 5
£862 GBP
View
16 more retailers have this diamond
Prices start from £195 GBPSave up to £668 GBP

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
£195 GBP