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Heart|Natural|GIA

1.25ct I SI2 Heart Natural Diamond

VG • I/SI2 • GIA 1232890989

Certificate GIA 1232890989

Diamond specifications and retailer prices

From £1,470 GBP
As of November 5, 2026
Save £256 GBP (15%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £1,725 GBP at Blue Nile · As of November 5, 2026
View at Blue Nile

About this 1.25ct natural heart diamond

This 1.25ct natural heart sits in the one-and-a-quarter to one-and-a-half carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 1232890989. Listed at 4 retailers as of November 5, 2026, with prices from £1,470 to £1,725, a £256 spread on the same certified stone. Blue Nile lists it at £1,725. 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

1.25
Carat
I
Colour
SI2
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle39.7°
OriginNatural
Grading LabGIA
CertificateGIA 1232890989
Dimensions6.50 × 7.65 × 4.27 mm
L/W Ratio1.18
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Twinning Wisp, Feather, Needle
Top View
6.50 mm7.65 mm1.25 ctI / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1232890989
Side View
Table 57.0%Crown 35.5°Girdle: THN-THKPavilion 39.7°Culet: NoneDepth 55.8%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £1,725 GBP|Low: £1,470 GBP|High: £1,883 GBP|Avg: £1,654 GBP|-5.6%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
November 6, 2026
Retailer 4£1,470 GBP
Retailer 2£1,555 GBP
Retailer 3£1,674 GBP
Blue Nile£1,725 GBP

41 data points across 4 retailers

4 retailers£1,470 GBP to £1,725 GBP

A
Cheapest Retailer
-
£1,470 GBP
A
Retailer 2
-
£1,555 GBP
View
A
Retailer 3
-
£1,674 GBP
View
Most Expensive
A
Blue Nile
28559130 · Nov 5
£1,725 GBP
$2,309 USD
View
3 more retailers have this diamond
Prices start from £1,470 GBPSave up to £256 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
1.25ct Heart
£1,470 GBP