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Round|Natural|GIA

1.50ct I SI2 Round Natural Diamond

EX • I/SI2 • GIA 5426823638

Certificate GIA 5426823638

Diamond specifications and retailer prices

From £1,998 GBP
$2,677 USD
As of October 31, 2026
Save £6,068 GBP (75%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £8,066 GBP at Wholesale Diamonds Direct · As of October 26, 2026
View at Wholesale Diamonds Direct

About this 1.5ct natural round diamond

This 1.5ct natural round sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5426823638. Listed at 9 retailers as of October 26, 2026, with prices from £1,998 to £8,066, a £6,068 spread on the same certified stone. Wholesale Diamonds Direct lists it at £8,066. 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

1.50
Carat
I
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 5426823638
Dimensions7.31 × 7.27 × 4.55 mm
L/W Ratio1.01
Culet sizeNone
Top View
7.31 mm7.27 mm1.50 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5426823638
Side View
Table 58.0%Crown 36°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.4%

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: Oct 31
Current: £4,176 GBP|Low: £1,998 GBP|High: £8,066 GBP|Avg: £4,740 GBP|-2.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Wholesale Diamonds Direct
October 23, 2026
Retailer 6£1,998 GBP
Retailer 5£2,075 GBP
Retailer 8£3,731 GBP
Retailer 3£3,848 GBP
Retailer 4£3,859 GBP
Retailer 1£4,176 GBP
Retailer 2£4,765 GBP
Retailer 7£5,064 GBP
Retailer 12£5,330 GBP
Retailer 10£5,418 GBP
Retailer 11£5,418 GBP
Retailer 9£5,597 GBP
Wholesale Diamonds Direct£8,066 GBP

9 data points across 13 retailers

9 retailers£1,998 GBP to £8,066 GBP

A
Cheapest Retailer
-
£1,998 GBP
$2,677 USD
A
Retailer 2
-
£2,075 GBP
$2,780 USD
View
Retailer 3
-
£3,731 GBP
$4,999 USD
View
Price last confirmed 7 days ago
B+
Retailer 4
-
£4,176 GBP
$5,596 USD
View
B+
Retailer 5
-
£5,064 GBP
$6,785 USD
View
B
Retailer 6
-
£5,418 GBP
$7,260 USD
View
B
Retailer 7
-
£5,418 GBP
$7,260 USD
View
B
Retailer 8
-
£5,597 GBP
$7,500 USD
View
Most Expensive
B
Wholesale Diamonds Direct
581904020 · Oct 26
£8,066 GBP
$10,808 USD
View
8 more retailers have this diamond
Prices start from £1,998 GBPSave up to £6,068 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 Round
£1,998 GBP