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Round|Natural|GIA

1.23ct D SI2 Round Natural Diamond

EX • D/SI2 • GIA 6555769796

Certificate GIA 6555769796

Diamond specifications and retailer prices

From £2,435 GBP
$3,262 USD
As of October 30, 2026
Save £2,343 GBP (49%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £4,777 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.23ct natural round diamond

This 1.23ct natural round sits in the classic one-carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6555769796. Listed at 12 retailers as of October 30, 2026, with prices from £2,435 to £4,777, a £2,343 spread on the same certified stone. NZ Jewellers lists it at £4,777. 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
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle36.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 6555769796
Dimensions6.82 × 6.76 × 4.27 mm
L/W Ratio1.01
Girdle conditionFaceted
Top View
6.82 mm6.76 mm1.23 ctD / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 6555769796
Side View
Table 56.0%Crown 36.5°Girdle: MED-STKPavilion 40.8°CuletDepth 62.8%

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: Oct 30
Current: £4,777 GBP|Low: £2,364 GBP|High: £4,867 GBP|Avg: £3,151 GBP|-1.8%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 30, 2026
Retailer 12£2,435 GBP
Retailer 3£2,531 GBP
Retailer 4£2,583 GBP
Retailer 8£2,742 GBP
Retailer 10£2,742 GBP
Retailer 9£2,848 GBP
Retailer 5£2,848 GBP
Retailer 7£3,161 GBP
Retailer 11£3,164 GBP
Retailer 2£3,211 GBP
Retailer 6£4,610 GBP
NZ Jewellers£4,777 GBP

41 data points across 12 retailers

12 retailers£2,435 GBP to £4,777 GBP

A
Cheapest Retailer
-
£2,435 GBP
$3,262 USD
A
Retailer 2
-
£2,531 GBP
$3,391 USD
View
Final sale: no returns
B+
Retailer 3
-
£2,742 GBP
$3,674 USD
View
B+
Retailer 4
-
£2,742 GBP
$3,674 USD
View
B+
Retailer 5
-
£2,848 GBP
$3,816 USD
View
B+
Retailer 6
-
£2,848 GBP
View
B+
Retailer 7
-
£3,161 GBP
View
B+
Retailer 8
-
£3,164 GBP
$4,239 USD
View
B+
Retailer 9
-
£3,211 GBP
€4,097 EUR
View
Retailer 10
-
£3,282 GBP
$4,398 USD
View
Price last confirmed 63 days ago
B
Retailer 11
-
£4,610 GBP
View
Most Expensive
B
NZ Jewellers
fa709ad6-558f-4b7a-98ff-660f780ca4b6 · Oct 30
£4,777 GBP
$6,401 USD
View
11 more retailers have this diamond
Prices start from £2,435 GBPSave up to £2,343 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
£2,435 GBP