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Round|Natural|GIA

1.50ct D SI2 Round Natural Diamond

ID • D/SI2 • GIA 326

Certificate GIA 326

Diamond specifications and retailer prices

From £3,611 GBP
As of October 31, 2026
Save £752 GBP (17%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £6,017 GBP at Helzberg Diamonds · As of October 30, 2026
View at Helzberg Diamonds

About this 1.5ct natural round diamond

This 1.5ct natural round sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA. Listed at 4 retailers as of October 31, 2026, with a relatively tight 21% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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
D
Colour
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 326
Dimensions7.41 × 7.46 × 4.47 mm
L/W Ratio1.01
Top View
7.41 mm7.46 mm1.50 ctD / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 326
Side View
Table 60.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 59.7%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 31
Current: £6,017 GBP|Low: £3,115 GBP|High: £6,555 GBP|Avg: £4,219 GBP|-8.2%
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 28, 2026
Retailer 5£3,115 GBP
Retailer 9£3,184 GBP
Retailer 6£3,502 GBP
Retailer 2£3,611 GBP
Retailer 3£3,700 GBP
Retailer 7£4,040 GBP
Retailer 4£4,363 GBP
Helzberg Diamonds£6,017 GBP
Retailer 8£6,100 GBP

25 data points across 9 retailers

4 retailers£3,611 GBP to £4,363 GBP

A
Cheapest Retailer
-
£3,611 GBP
Retailer 2
-
£3,700 GBP
View
Price last confirmed 9 days ago
A
Retailer 3
-
£4,363 GBP
View
Most Expensive
Helzberg Diamonds
XZRIIKLGLJOLM · Oct 30
£6,017 GBP
$8,098 USD
View
Price last confirmed 7 days ago
3 more retailers have this diamond
Prices start from £3,611 GBPSave up to £752 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
£3,611 GBP