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Heart|Natural|GIA

1.31ct D SI1 Heart Natural Diamond

GD • D/SI1 • GIA 6535430494

Certificate GIA 6535430494

Diamond specifications and retailer prices

From £3,081 GBP
As of November 5, 2026
Save £2,617 GBP (46%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £6,506 GBP at NZ Jewellers · As of September 21, 2026
View at NZ Jewellers

About this 1.31ct natural heart diamond

This 1.31ct natural heart sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 6535430494. Listed at 5 retailers as of November 4, 2026, with a 85% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.31
Carat
D
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6535430494
Dimensions7.42 × 6.15 × 3.91 mm
L/W Ratio1.21
Top View
7.42 mm6.15 mm1.31 ctD / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6535430494
Side View
Table 60.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 63.5%

Caratlytics Score

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

Price History

Last verified: Nov 5
Current: £3,081 GBP|Low: £2,837 GBP|High: £5,978 GBP|Avg: £3,707 GBP|-5.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 5, 2026
Retailer 7£3,065 GBP
Retailer 1£3,081 GBP
Retailer 2£3,152 GBP
Retailer 3£3,269 GBP
Retailer 5£3,479 GBP
Retailer 10£3,537 GBP
Retailer 9£3,747 GBP
Retailer 8£3,748 GBP
Retailer 6£3,750 GBP
Retailer 11£3,893 GBP
Retailer 4£5,698 GBP

15 data points across 11 retailers

5 retailers£3,081 GBP to £5,698 GBP

B+
Cheapest Retailer
-
£3,081 GBP
Retailer 2
-
£3,383 GBP
View
Price last confirmed 45 days ago
Retailer 3
-
£3,479 GBP
View
Price last confirmed 9 days ago
B
Retailer 4
-
£5,698 GBP
View
Most Expensive
NZ Jewellers
bf7311fe-6661-4c0b-acfa-094dc50d6ea3 · Sep 21
£6,506 GBP
$8,708 USD
View
Price last confirmed 46 days ago
4 more retailers have this diamond
Prices start from £3,081 GBPSave up to £2,617 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.

B+
1.31ct Heart
£3,081 GBP