Round|Natural|GIA

0.40ct J SI1 Round Natural Diamond

VG • J/SI1 • GIA 1429661194

Certificate GIA 1429661194

Diamond specifications and retailer prices

From £182 GBP
$244 USD
As of October 28, 2026
Save £730 GBP (80%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £912 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 0.4ct natural round diamond

This 0.4ct natural round sits in the sub-half-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by GIA 1429661194. Listed at 19 retailers as of October 28, 2026, with prices from £182 to £912, a £730 spread on the same certified stone. NZ Jewellers lists it at £912. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.40
Carat
J
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
Crown angle36.5°
Pavilion angle39.8°
OriginNatural
Grading LabGIA
CertificateGIA 1429661194
Dimensions4.69 × 4.62 × 2.91 mm
L/W Ratio1.02
Culet sizeNone
Key to symbols
Crystal
Top View
4.69 mm4.62 mm0.40 ctJ / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 1429661194
Side View
Table 57.0%Crown 36.5°Girdle: MED-THKPavilion 39.8°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 28
Current: £912 GBP|Low: £182 GBP|High: £932 GBP|Avg: £340 GBP|-2.2%
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
October 30, 2026
Retailer 3£182 GBP
Retailer 11£190 GBP
Retailer 7£217 GBP
Retailer 8£222 GBP
Retailer 5£244 GBP
Retailer 4£254 GBP
Retailer 12£254 GBP
Retailer 13£261 GBP
Retailer 15£270 GBP
Retailer 16£275 GBP
Retailer 2£312 GBP
Retailer 14£329 GBP
Retailer 6£330 GBP
Retailer 9£391 GBP
Retailer 10£467 GBP
NZ Jewellers£912 GBP

37 data points across 16 retailers

19 retailers£182 GBP to £912 GBP

A
Cheapest Retailer
-
£182 GBP
$244 USD
Retailer 2
-
£190 GBP
$255 USD
View
Price last confirmed 9 days ago
A
Retailer 3
-
£196 GBP
$263 USD
View
A
Retailer 4
-
£204 GBP
$273 USD
View
B+
Retailer 5
-
£222 GBP
$298 USD
View
A
Retailer 6
-
£244 GBP
$327 USD
View
B+
Retailer 7
-
£246 GBP
$329 USD
View
B+
Retailer 8
-
£254 GBP
$340 USD
View
B+
Retailer 9
-
£254 GBP
$340 USD
View
B+
Retailer 10
-
£261 GBP
$350 USD
View
B+
Retailer 11
-
£270 GBP
$362 USD
View
B+
Retailer 12
-
£275 GBP
$369 USD
View
B+
Retailer 13
-
£312 GBP
ZAR 6,757 ZAR
View
B+
Retailer 14
-
£318 GBP
€406 EUR
View
B+
Retailer 15
-
£329 GBP
$441 USD
View
Retailer 16
-
£330 GBP
A$680 AUD
View
Price last confirmed 27 days ago
B
Retailer 17
-
£391 GBP
€499 EUR
View
B
Retailer 18
-
£467 GBP
View
Most Expensive
C
NZ Jewellers
833d2bf4-bf1a-41d3-8056-605fb38016d9 · Oct 30
£912 GBP
$1,222 USD
View
18 more retailers have this diamond
Prices start from £182 GBPSave up to £730 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
0.40ct Round
£182 GBP