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Round|Natural|GIA

3.42ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 6147842518

Certificate GIA 6147842518

Diamond specifications and retailer prices

From £15,503 GBP
$20,772 USD
As of October 31, 2026
Save £5,365 GBP (26%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £20,868 GBP at Yorxs · As of November 1, 2026
View at Yorxs

About this 3.42ct natural round diamond

This 3.42ct 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 6147842518. Listed at 4 retailers as of October 31, 2026, with prices from £15,503 to £20,868, a £5,365 spread on the same certified stone. Yorxs lists it at £20,868. 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

3.42
Carat
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 6147842518
Dimensions9.63 × 9.71 × 5.87 mm
L/W Ratio1.01
Top View
9.63 mm9.71 mm3.42 ctJ / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceStrong
CertificateGIA 6147842518
Side View
Table 62.0%CrownGirdle: MED-STKPavilionCulet: Very SmallDepth 60.7%

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: £16,170 GBP|Low: £15,503 GBP|High: £21,015 GBP|Avg: £17,185 GBP|-0.4%
Retailer 1
Retailer 2
Retailer 3
Yorxs
November 1, 2026
Retailer 2£15,503 GBP
Retailer 1£16,170 GBP
Retailer 3£16,430 GBP
Yorxs£20,868 GBP

20 data points across 4 retailers

4 retailers£15,503 GBP to £20,868 GBP

A
Cheapest Retailer
-
£15,503 GBP
$20,772 USD
A
Retailer 2
-
£16,170 GBP
₹2,063,414 INR
View
B+
Retailer 3
-
£16,430 GBP
$22,014 USD
View
Most Expensive
B+
Yorxs
784-518 · Nov 1
£20,868 GBP
€26,629 EUR
View
3 more retailers have this diamond
Prices start from £15,503 GBPSave up to £5,365 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
3.42ct Round
£15,503 GBP