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Round|Natural|GIA

1.51ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 1538904520

Certificate GIA 1538904520

Diamond specifications and retailer prices

From £5,525 GBP
As of November 4, 2026
Save £6,900 GBP (56%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: £12,425 GBP at NZ Jewellers · As of November 5, 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 E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1538904520. Listed at 25 retailers as of November 4, 2026, with prices from £5,525 to £12,425, a £6,900 spread on the same certified stone. NZ Jewellers lists it at £12,425. 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
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 1538904520
Dimensions7.31 × 7.26 × 4.57 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Cloud, Needle
Top View
7.31 mm7.26 mm1.51 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1538904520
Side View
Table 57.0%Crown 34.5°Girdle: Sli. ThickPavilion 41.4°Culet: NoneDepth 63.0%

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 4
Current: £12,425 GBP|Low: £5,525 GBP|High: £12,425 GBP|Avg: £7,082 GBP
NZ Jewellers
Retailer 2
Retailer 3
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Retailer 24
November 6, 2026
Retailer 3£5,525 GBP
Retailer 15£5,539 GBP
Retailer 6£5,611 GBP
Retailer 11£5,790 GBP
Retailer 14£5,817 GBP
Retailer 23£6,178 GBP
Retailer 8£6,213 GBP
Retailer 22£6,213 GBP
Retailer 10£6,345 GBP
Retailer 13£6,659 GBP
Retailer 4£6,682 GBP
Retailer 7£6,730 GBP
Retailer 5£6,834 GBP
Retailer 17£6,883 GBP
Retailer 9£7,096 GBP
Retailer 12£7,096 GBP
Retailer 16£7,333 GBP
Retailer 2£7,599 GBP
Retailer 19£7,685 GBP
Retailer 21£7,766 GBP
Retailer 24£8,013 GBP
Retailer 18£9,063 GBP
Retailer 20£10,325 GBP
NZ Jewellers£12,425 GBP

24 data points across 24 retailers

25 retailers£5,525 GBP to £12,425 GBP

A
Cheapest Retailer
-
£5,525 GBP
A
Retailer 2
-
£5,539 GBP
View
A
Retailer 3
-
£5,611 GBP
View
A
Retailer 4
-
£5,790 GBP
View
A
Retailer 5
-
£5,817 GBP
View
A
Retailer 6
-
£6,178 GBP
View
Retailer 7
-
£6,213 GBP
View
Price last confirmed 8 days ago
B+
Retailer 8
-
£6,213 GBP
View
Final sale: no returns
B+
Retailer 9
-
£6,345 GBP
View
B+
Retailer 10
-
£6,659 GBP
View
B+
Retailer 11
-
£6,682 GBP
View
B+
Retailer 12
-
£6,730 GBP
View
B+
Retailer 13
-
£6,834 GBP
View
Retailer 14
-
£6,883 GBP
View
Price last confirmed 14 days ago
B+
Retailer 15
-
£7,096 GBP
View
B+
Retailer 16
-
£7,096 GBP
View
B+
Retailer 17
-
£7,333 GBP
View
B+
Retailer 18
-
£7,599 GBP
View
B+
Retailer 19
-
£7,685 GBP
View
B+
Retailer 20
-
£7,766 GBP
View
B+
Retailer 21
-
£8,013 GBP
View
Retailer 22
-
£8,255 GBP
View
Price last confirmed 14 days ago
B+
Retailer 23
-
£9,063 GBP
View
B
Retailer 24
-
£10,325 GBP
View
Most Expensive
B
NZ Jewellers
02c63f2b-ddb7-4ac2-8ebd-2141d1ef2b1a · Nov 5
£12,425 GBP
$16,723 USD
View
24 more retailers have this diamond
Prices start from £5,525 GBPSave up to £6,900 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
£5,525 GBP