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Round|Natural|GIA

3.50ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 1555165785

Certificate GIA 1555165785

Diamond specifications and retailer prices

From £21,404 GBP
SGD 38,756 SGD
As of November 1, 2026
Save £13,093 GBP (38%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £34,498 GBP at Helzberg Diamonds · As of November 1, 2026
View at Helzberg Diamonds

About this 3.5ct natural round diamond

This 3.5ct natural round sits in the three to five carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1555165785. Listed at 13 retailers as of November 1, 2026, with prices from £21,404 to £34,498, a £13,093 spread on the same certified stone. Helzberg Diamonds lists it at £34,498. 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

3.50
Carat
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 1555165785
Dimensions9.59 × 9.66 × 6.03 mm
L/W Ratio1.01
Culet sizeNone
Top View
9.59 mm9.66 mm3.50 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1555165785
Side View
Table 58.0%Crown 35.5°Girdle: Slightly ThickPavilion 41.2°Culet: NoneDepth 62.7%

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 1
Current: £34,498 GBP|Low: £21,404 GBP|High: £35,202 GBP|Avg: £26,555 GBP|-2.0%
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 1, 2026
Retailer 7£21,404 GBP
Retailer 6£22,327 GBP
Retailer 12£22,804 GBP
Retailer 3£23,364 GBP
Retailer 10£24,021 GBP
Retailer 8£24,140 GBP
Retailer 11£25,968 GBP
Retailer 5£27,344 GBP
Retailer 4£27,454 GBP
Retailer 9£28,240 GBP
Retailer 2£32,870 GBP
Helzberg Diamonds£34,498 GBP

33 data points across 12 retailers

13 retailers£21,404 GBP to £34,498 GBP

B+
Cheapest Retailer
-
£21,404 GBP
SGD 38,756 SGD
B+
Retailer 2
-
£22,327 GBP
View
B+
Retailer 3
-
£22,804 GBP
$30,555 USD
View
B+
Retailer 4
-
£23,364 GBP
$31,305 USD
View
B+
Retailer 5
-
£24,021 GBP
$32,186 USD
View
B+
Retailer 6
-
£24,140 GBP
SGD 43,709 SGD
View
B+
Retailer 7
-
£25,968 GBP
$34,794 USD
View
B+
Retailer 8
-
£27,344 GBP
€34,893 EUR
View
B+
Retailer 9
-
£27,454 GBP
$36,786 USD
View
B
Retailer 10
-
£28,240 GBP
$37,838 USD
View
B
Retailer 11
-
£29,508 GBP
$39,537 USD
View
B
Retailer 12
-
£32,870 GBP
$44,042 USD
View
Most Expensive
B
Helzberg Diamonds
XZRHLLLHMLNOL · Nov 1
£34,498 GBP
$46,223 USD
View
12 more retailers have this diamond
Prices start from £21,404 GBPSave up to £13,093 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+
3.50ct Round
£21,404 GBP