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Heart|Natural|GIA

1.21ct D SI2 Heart Natural Diamond

EX • D/SI2 • GIA 1545265538

Certificate GIA 1545265538

Diamond specifications and retailer prices

From £1,769 GBP
As of November 6, 2026
Save £2,105 GBP (54%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £4,507 GBP at Queensmith · As of October 28, 2026
View at Queensmith

About this 1.21ct natural heart diamond

This 1.21ct natural heart sits in the classic one-carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1545265538. Listed at 20 retailers as of November 4, 2026, with a 119% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.21
Carat
D
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1545265538
Dimensions7.33 × 6.74 × 4.30 mm
L/W Ratio1.09
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Crystal, Cloud, Cavity, Needle
Top View
7.33 mm6.74 mm1.21 ctD / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1545265538
Side View
Table 63.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 58.6%

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 6
Current: £4,507 GBP|Low: £1,759 GBP|High: £4,521 GBP|Avg: £2,597 GBP|+2.3%
Queensmith
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 9£1,769 GBP
Retailer 2£1,842 GBP
Retailer 7£2,085 GBP
Retailer 3£2,141 GBP
Retailer 11£2,144 GBP
Retailer 6£2,403 GBP
Retailer 10£2,430 GBP
Retailer 5£2,459 GBP
Retailer 4£2,705 GBP
Retailer 8£3,875 GBP
Queensmith£4,507 GBP

30 data points across 11 retailers

20 retailers£1,769 GBP to £3,875 GBP

A
Cheapest Retailer
-
£1,769 GBP
A
Retailer 2
-
£1,842 GBP
View
B+
Retailer 3
-
£2,085 GBP
View
B+
Retailer 4
-
£2,141 GBP
View
B+
Retailer 5
-
£2,144 GBP
View
Final sale: no returns
B+
Retailer 6
-
£2,195 GBP
View
Retailer 7
-
£2,336 GBP
View
Price last confirmed 19 days ago
Retailer 8
-
£2,336 GBP
View
Price last confirmed 21 days ago
Retailer 9
-
£2,349 GBP
View
Price last confirmed 45 days ago
B+
Retailer 10
-
£2,403 GBP
View
Retailer 11
-
£2,426 GBP
View
Price last confirmed 21 days ago
B+
Retailer 12
-
£2,430 GBP
View
B+
Retailer 13
-
£2,459 GBP
View
Retailer 14
-
£2,696 GBP
View
Price last confirmed 18 days ago
B+
Retailer 15
-
£2,705 GBP
View
Retailer 16
-
£2,711 GBP
View
Price last confirmed 45 days ago
B
Retailer 17
-
£3,875 GBP
View
Retailer 18
-
£4,070 GBP
View
Price last confirmed 19 days ago
Retailer 19
-
£4,093 GBP
View
Price last confirmed 47 days ago
Most Expensive
Queensmith
1545265538 · Oct 28
£4,507 GBP
View
Price last confirmed 9 days ago
19 more retailers have this diamond
Prices start from £1,769 GBPSave up to £2,105 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
1.21ct Heart
£1,769 GBP