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Heart|Natural|GIA

1.21ct I SI1 Heart Natural Diamond

EX • I/SI1 • GIA 5241078543

Certificate GIA 5241078543

Diamond specifications and retailer prices

From $1,894 USD
HK$14,800 HKD
As of November 1, 2026
Save $2,532 USD (57%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $5,282 USD at NZ Jewellers · As of October 18, 2026
View at NZ Jewellers

About this 1.21ct natural heart diamond

This 1.21ct natural heart sits in the classic one-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5241078543. Listed at 16 retailers as of November 1, 2026, with a 134% 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
I
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 5241078543
Dimensions6.53 × 7.44 × 4.31 mm
L/W Ratio1.14
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Needle
Top View
6.53 mm7.44 mm1.21 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 5241078543
Side View
Table 59.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 57.9%

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 1
Current: $2,451 USD|Low: $1,882 USD|High: $4,479 USD|Avg: $2,676 USD|-1.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 8$1,894 USD
Retailer 10$2,202 USD
Retailer 5$2,318 USD
Retailer 2$2,355 USD
Retailer 1$2,451 USD
Retailer 3$2,641 USD
Retailer 4$2,653 USD
Retailer 6$2,685 USD
Retailer 11$2,831 USD
Retailer 9$3,106 USD
Retailer 7$4,426 USD

39 data points across 11 retailers

16 retailers$1,894 USD to $4,426 USD

A
Cheapest Retailer
-
$1,894 USD
HK$14,800 HKD
A
Retailer 2
-
$2,202 USD
SGD 2,976 SGD
View
B+
Retailer 3
-
$2,318 USD
View
Final sale: no returns
B+
Retailer 4
-
$2,355 USD
View
B+
Retailer 5
-
$2,451 USD
£1,930 GBP
View
Retailer 6
-
$2,527 USD
View
Price last confirmed 15 days ago
Retailer 7
-
$2,527 USD
View
Price last confirmed 17 days ago
B+
Retailer 8
-
$2,641 USD
SGD 3,569 SGD
View
Retailer 9
-
$2,643 USD
View
Price last confirmed 16 days ago
B+
Retailer 10
-
$2,653 USD
View
B+
Retailer 11
-
$2,685 USD
£2,114 GBP
View
Retailer 12
-
$2,831 USD
A$4,355 AUD
View
Price last confirmed 25 days ago
Retailer 13
-
$2,915 USD
View
Price last confirmed 14 days ago
B+
Retailer 14
-
$3,106 USD
ZAR 50,170 ZAR
View
B
Retailer 15
-
$4,426 USD
£3,485 GBP
View
Most Expensive
NZ Jewellers
b8ff14db-c968-4b36-b67a-db21493df5da · Oct 18
$5,282 USD
View
Price last confirmed 15 days ago
15 more retailers have this diamond
Prices start from $1,894 USDSave up to $2,532 USD

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
$1,894 USD