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Heart|Natural|IGI

1.50ct K SI1 Heart Natural Diamond

VG • K/SI1 • IGI 681559672

Shape and cutting style on the report: Heart brilliant

Certificate IGI 681559672

Diamond specifications and retailer prices

From £1,129 GBP
As of November 5, 2026
Save £1,448 GBP (56%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £3,278 GBP at NZ Jewellers · As of September 20, 2026
View at NZ Jewellers

About this 1.5ct natural heart diamond

This 1.5ct natural heart sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 681559672. Listed at 15 retailers as of November 4, 2026, with a 128% 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

1.50
Carat
K
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.3°
Pavilion angle35.8°
OriginNatural
Grading LabIGI
CertificateIGI 681559672
Dimensions6.88 × 7.88 × 4.54 mm
L/W Ratio1.15
Girdle conditionFaceted
Culet sizePointed
Top View
6.88 mm7.88 mm1.50 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 681559672
Side View
Table 60.0%Crown 39.3°Girdle: STK-VTKPavilion 35.8°Culet: NoneDepth 57.6%

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 5
Current: £1,359 GBP|Low: £1,129 GBP|High: £2,669 GBP|Avg: £1,741 GBP|-39.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 8£1,129 GBP
Retailer 1£1,359 GBP
Retailer 3£1,438 GBP
Retailer 7£1,467 GBP
Retailer 12£1,479 GBP
Retailer 11£1,487 GBP
Retailer 4£1,489 GBP
Retailer 2£1,550 GBP
Retailer 9£1,800 GBP
Retailer 5£2,147 GBP
Retailer 6£2,486 GBP
Retailer 10£2,577 GBP

23 data points across 12 retailers

15 retailers£1,129 GBP to £2,577 GBP

A
Cheapest Retailer
-
£1,129 GBP
B+
Retailer 2
-
£1,359 GBP
View
A
Retailer 3
-
£1,438 GBP
View
A
Retailer 4
-
£1,467 GBP
View
A
Retailer 5
-
£1,479 GBP
View
B+
Retailer 6
-
£1,487 GBP
View
Retailer 7
-
£1,489 GBP
View
Price last confirmed 8 days ago
A
Retailer 8
-
£1,550 GBP
View
Retailer 9
-
£1,568 GBP
View
Price last confirmed 45 days ago
B+
Retailer 10
-
£1,591 GBP
View
B+
Retailer 11
-
£1,800 GBP
View
B+
Retailer 12
-
£2,147 GBP
View
B+
Retailer 13
-
£2,486 GBP
View
B+
Retailer 14
-
£2,577 GBP
View
Most Expensive
NZ Jewellers
894ea465-fda4-48ff-a268-5fac68c966c3 · Sep 20
£3,278 GBP
$4,388 USD
View
Price last confirmed 46 days ago
14 more retailers have this diamond
Prices start from £1,129 GBPSave up to £1,448 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
1.50ct Heart
£1,129 GBP