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Round|Natural|GIA

1.51ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 2527507448

Certificate GIA 2527507448

Diamond specifications and retailer prices

From £6,124 GBP
$8,205 USD
As of November 1, 2026
Save £5,111 GBP (45%) vs most expensive(unlock to see where)
27 retailers carry this diamond
Most expensive: £11,235 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2527507448. Listed at 27 retailers as of October 30, 2026, with prices from £6,124 to £11,235, a £5,111 spread on the same certified stone. NZ Jewellers lists it at £11,235. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.51
Carat
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 2527507448
Dimensions7.28 × 7.33 × 4.57 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Top View
7.28 mm7.33 mm1.51 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2527507448
Side View
Table 56.0%Crown 36.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.5%

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 1
Current: £6,427 GBP|Low: £5,356 GBP|High: £10,655 GBP|Avg: £7,835 GBP|+20.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 1, 2026
Retailer 1£6,427 GBP
Retailer 7£6,740 GBP
Retailer 4£7,322 GBP
Retailer 6£7,409 GBP
Retailer 8£7,415 GBP
Retailer 2£8,062 GBP
Retailer 5£9,903 GBP
Retailer 3£10,528 GBP

40 data points across 8 retailers

27 retailers£6,124 GBP to £11,235 GBP

A
Cheapest Retailer
-
£6,124 GBP
$8,205 USD
A
Retailer 2
-
£6,312 GBP
$8,457 USD
View
A
Retailer 3
-
£6,427 GBP
$8,611 USD
View
B+
Retailer 4
-
£6,507 GBP
$8,718 USD
View
B+
Retailer 5
-
£6,687 GBP
$8,960 USD
View
B+
Retailer 6
-
£6,740 GBP
$9,031 USD
View
Final sale: no returns
B+
Retailer 7
-
£6,741 GBP
$9,032 USD
View
B+
Retailer 8
-
£7,187 GBP
$9,630 USD
View
Retailer 9
-
£7,303 GBP
$9,785 USD
View
Price last confirmed 51 days ago
B+
Retailer 10
-
£7,303 GBP
$9,785 USD
View
B+
Retailer 11
-
£7,322 GBP
View
Retailer 12
-
£7,409 GBP
A$15,274 AUD
View
Price last confirmed 9 days ago
B+
Retailer 13
-
£7,415 GBP
$9,935 USD
View
Retailer 14
-
£7,460 GBP
$9,996 USD
View
Price last confirmed 9 days ago
B+
Retailer 15
-
£7,498 GBP
$10,046 USD
View
B+
Retailer 16
-
£7,524 GBP
$10,082 USD
View
B+
Retailer 17
-
£7,807 GBP
$10,460 USD
View
B+
Retailer 18
-
£7,807 GBP
$10,460 USD
View
B+
Retailer 19
-
£8,062 GBP
€10,288 EUR
View
B+
Retailer 20
-
£8,068 GBP
$10,810 USD
View
B+
Retailer 21
-
£8,188 GBP
$10,971 USD
View
Retailer 22
-
£8,426 GBP
$11,290 USD
View
Price last confirmed 55 days ago
B+
Retailer 23
-
£8,426 GBP
$11,290 USD
View
B
Retailer 24
-
£9,903 GBP
ZAR 214,361 ZAR
View
B
Retailer 25
-
£10,528 GBP
View
Retailer 26
-
£11,235 GBP
$15,053 USD
View
Price last confirmed 52 days ago
Most Expensive
B
NZ Jewellers
37a199b9-87a9-47ef-83b8-89bff342d19c · Oct 30
£11,235 GBP
$15,053 USD
View
26 more retailers have this diamond
Prices start from £6,124 GBPSave up to £5,111 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
1.51ct Round
£6,124 GBP