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Marquise|Natural|GIA

1.51ct K SI2 Marquise Natural Diamond

EX • K/SI2 • GIA 1565044917

Certificate GIA 1565044917

Diamond specifications and retailer prices

From £3,506 GBP
As of November 6, 2026
Save £1,315 GBP (27%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £7,422 GBP at NZ Jewellers · As of October 27, 2026
View at NZ Jewellers

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1565044917. Listed at 15 retailers as of November 6, 2026, with a 38% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
K
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle37.49°
Pavilion angle41.62°
OriginNatural
Grading LabGIA
CertificateGIA 1565044917
Dimensions11.24 × 5.94 × 3.83 mm
L/W Ratio1.89
Culet sizeNone
Top View
11.24 mm5.94 mm1.51 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 1565044917
Side View
Table 59.0%Crown 37.49°Girdle: MED-THKPavilion 41.62°Culet: NDepth 64.5%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £7,422 GBP|Low: £2,226 GBP|High: £7,422 GBP|Avg: £4,234 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
November 6, 2026
Retailer 9£2,226 GBP
Retailer 8£3,296 GBP
Retailer 16£3,388 GBP
Retailer 2£3,506 GBP
Retailer 5£3,549 GBP
Retailer 4£3,742 GBP
Retailer 10£3,819 GBP
Retailer 3£4,020 GBP
Retailer 17£4,020 GBP
Retailer 18£4,020 GBP
Retailer 14£4,315 GBP
Retailer 6£4,332 GBP
Retailer 11£4,422 GBP
Retailer 13£4,639 GBP
Retailer 12£4,821 GBP
Retailer 7£4,895 GBP
Retailer 15£6,572 GBP
NZ Jewellers£7,422 GBP

24 data points across 18 retailers

15 retailers£3,506 GBP to £4,821 GBP

Retailer 1
-
£3,388 GBP
Price last confirmed 9 days ago
B+
Retailer 2
-
£3,506 GBP
View
Retailer 3
-
£3,549 GBP
View
Price last confirmed 14 days ago
B+
Retailer 4
-
£3,742 GBP
View
Retailer 5
-
£4,020 GBP
View
Price last confirmed 12 days ago
Retailer 6
-
£4,020 GBP
View
Price last confirmed 12 days ago
Retailer 7
-
£4,020 GBP
View
Price last confirmed 11 days ago
Retailer 8
-
£4,315 GBP
View
Price last confirmed 8 days ago
B+
Retailer 9
-
£4,332 GBP
View
B+
Retailer 10
-
£4,422 GBP
View
B+
Retailer 11
-
£4,639 GBP
View
B
Retailer 12
-
£4,821 GBP
View
Retailer 13
-
£4,895 GBP
View
Price last confirmed 23 days ago
Retailer 14
-
£6,572 GBP
View
Price last confirmed 8 days ago
Most Expensive
NZ Jewellers
806b2da5-6dec-4d07-8cc4-99c803ea1106 · Oct 27
£7,422 GBP
$9,934 USD
View
Price last confirmed 10 days ago
14 more retailers have this diamond
Prices start from £3,506 GBPSave up to £1,315 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.

B+
1.51ct Marquise
£3,506 GBP