Heart|Natural|GIA

1.55ct K SI1 Heart Natural Diamond

VG • K/SI1 • GIA 2507568166

Certificate GIA 2507568166

Diamond specifications and retailer prices

From £4,938 GBP
As of November 6, 2026
14 retailers carry this diamond
Most expensive: £5,270 GBP at NZ Jewellers · As of September 29, 2026
View at NZ Jewellers

About this 1.55ct natural heart diamond

This 1.55ct 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 stated by the retailer rather than the lab and certified by GIA 2507568166. Listed at 14 retailers as of November 6, 2026. 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

1.55
Carat
K
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishVery Good
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2507568166
Dimensions7.88 × 7.21 × 4.17 mm
L/W Ratio1.09
Top View
7.88 mm7.21 mm1.55 ctK / SI1
OriginNatural
CutVery Good
PolishVery Good
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2507568166
Side View
Table 57.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 57.9%

Caratlytics Score

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Price History

Last verified: Nov 6
Current: £4,938 GBP|Low: £2,433 GBP|High: £5,234 GBP|Avg: £3,239 GBP|+41.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 6, 2026
Retailer 9£2,433 GBP
Retailer 2£2,488 GBP
Retailer 13£2,574 GBP
Retailer 11£2,741 GBP
Retailer 10£2,898 GBP
Retailer 5£2,914 GBP
Retailer 6£3,080 GBP
Retailer 3£3,093 GBP
Retailer 12£3,423 GBP
Retailer 4£3,569 GBP
Retailer 7£3,673 GBP
Retailer 1£4,938 GBP
Retailer 8£5,119 GBP

31 data points across 13 retailers

14 retailers

Retailer 1
-
£2,433 GBP
Price last confirmed 25 days ago
Retailer 2
-
£2,574 GBP
View
Price last confirmed 26 days ago
Retailer 3
-
£2,740 GBP
View
Price last confirmed 29 days ago
Retailer 4
-
£2,740 GBP
View
Price last confirmed 25 days ago
Retailer 5
-
£2,741 GBP
View
Price last confirmed 26 days ago
Retailer 6
-
£2,846 GBP
View
Price last confirmed 36 days ago
Retailer 7
-
£2,898 GBP
View
Price last confirmed 27 days ago
Retailer 8
-
£3,080 GBP
View
Price last confirmed 24 days ago
Retailer 9
-
£3,162 GBP
View
Price last confirmed 28 days ago
Retailer 10
-
£3,423 GBP
View
Price last confirmed 25 days ago
Retailer 11
-
£3,673 GBP
View
Price last confirmed 25 days ago
C
Retailer 12
-
£4,938 GBP
View
Retailer 13
-
£5,119 GBP
View
Price last confirmed 26 days ago
Most Expensive
NZ Jewellers
7fb79610-9bae-4e2e-870b-ea2ab4484357 · Sep 29
£5,270 GBP
$7,054 USD
View
Price last confirmed 38 days ago
13 more retailers have this diamond
Prices start from £4,938 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.

C
1.55ct Heart
£4,938 GBP