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Heart|Natural|GIA

1.21ct H SI1 Heart Natural Diamond

GD • H/SI1 • GIA 6137692565

Certificate GIA 6137692565

Diamond specifications and retailer prices

From $3,048 AUD
As of November 6, 2026
Save $1,589 AUD (34%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $4,637 AUD at 77 Diamonds · As of November 6, 2026
View at 77 Diamonds

About this 1.21ct natural heart diamond

This 1.21ct natural heart sits in the classic one-carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 6137692565. Listed at 4 retailers as of November 6, 2026, with prices from $3,048 to $4,637, a $1,589 spread on the same certified stone. 77 Diamonds lists it at $4,637. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.21
Carat
H
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishVery Good
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6137692565
Dimensions5.75 × 5.63 × 4.32 mm
L/W Ratio1.02
Top View
5.75 mm5.63 mm1.21 ctH / SI1
OriginNatural
CutGood
PolishVery Good
SymmetryGood
FluorescenceNone
CertificateGIA 6137692565
Side View
Table 56.0%CrownGirdle: VTK-EXTPavilionCulet: NoneDepth 76.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $4,637 AUD|Low: $3,048 AUD|High: $4,688 AUD|Avg: $3,884 AUD|+1.3%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
November 6, 2026
Retailer 2$3,048 AUD
Retailer 3$3,377 AUD
Retailer 4$4,451 AUD
77 Diamonds$4,637 AUD

36 data points across 4 retailers

4 retailers$3,048 AUD to $4,637 AUD

B+
Cheapest Retailer
-
$3,048 AUD
B+
Retailer 2
-
$3,155 AUD
View
B+
Retailer 3
-
$3,308 AUD
View
Most Expensive
B
77 Diamonds
CUSMBK2MYAZFQ · Nov 6
$4,637 AUD
£2,509 GBP
View
3 more retailers have this diamond
Prices start from $3,048 AUDSave up to $1,589 AUD

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.

B+
1.21ct Heart
$3,048 AUD