Round|Natural|GIA

1.70ct J SI2 Round Natural Diamond

VG • J/SI2 • GIA 6421992372

Certificate GIA 6421992372

Diamond specifications and retailer prices

From £3,083 GBP
$4,105 USD
As of October 25, 2026
Save £3,412 GBP (53%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £6,783 GBP at NZ Jewellers · As of September 28, 2026
View at NZ Jewellers

About this 1.7ct natural round diamond

This 1.7ct natural round sits in the one-and-a-half to two carat band, graded J colour (near-colourless) and SI2 clarity (slightly-included), with a very-good cut grade and certified by GIA 6421992372. Listed at 20 retailers as of October 25, 2026, with a 111% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.70
Carat
J
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceMedium
Crown angle38.5°
Pavilion angle39.8°
OriginNatural
Grading LabGIA
CertificateGIA 6421992372
Dimensions7.48 × 7.37 × 4.80 mm
L/W Ratio1.01
Top View
7.48 mm7.37 mm1.70 ctJ / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 6421992372
Side View
Table 55.0%Crown 38.5°Girdle: ThickPavilion 39.8°Culet: NoneDepth 64.7%

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: Oct 25
Current: £3,919 GBP|Low: £2,669 GBP|High: £6,537 GBP|Avg: £4,039 GBP|+1.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 29, 2026
Retailer 5£3,083 GBP
Retailer 8£3,126 GBP
Retailer 4£3,203 GBP
Retailer 7£3,391 GBP
Retailer 1£3,919 GBP
Retailer 3£4,328 GBP
Retailer 9£4,826 GBP
Retailer 6£5,873 GBP
Retailer 2£6,495 GBP

35 data points across 9 retailers

20 retailers£3,083 GBP to £6,495 GBP

B+
Cheapest Retailer
-
£3,083 GBP
$4,105 USD
B+
Retailer 2
-
£3,115 GBP
$4,148 USD
View
B+
Retailer 3
-
£3,126 GBP
$4,163 USD
View
B+
Retailer 4
-
£3,203 GBP
$4,266 USD
View
B+
Retailer 5
-
£3,204 GBP
$4,267 USD
View
B+
Retailer 6
-
£3,243 GBP
$4,319 USD
View
B+
Retailer 7
-
£3,391 GBP
$4,516 USD
View
Final sale: no returns
B+
Retailer 8
-
£3,674 GBP
$4,893 USD
View
Price last confirmed 28 days ago
B+
Retailer 9
-
£3,674 GBP
$4,893 USD
View
Price last confirmed 29 days ago
B+
Retailer 10
-
£3,737 GBP
$4,977 USD
View
B
Retailer 11
-
£3,877 GBP
$5,164 USD
View
B+
Retailer 12
-
£3,919 GBP
View
B
Retailer 13
-
£4,040 GBP
$5,380 USD
View
B
Retailer 14
-
£4,040 GBP
$5,380 USD
View
B
Retailer 15
-
£4,175 GBP
$5,560 USD
View
B
Retailer 16
-
£4,240 GBP
$5,646 USD
View
Price last confirmed 29 days ago
B
Retailer 17
-
£4,328 GBP
€5,489 EUR
View
B
Retailer 18
-
£5,873 GBP
$7,820 USD
View
B
Retailer 19
-
£6,495 GBP
View
Most Expensive
C
NZ Jewellers
bff5df65-5216-47ee-9b5d-5d99672620a2 · Sep 28
£6,783 GBP
$9,033 USD
View
Price last confirmed 31 days ago
19 more retailers have this diamond
Prices start from £3,083 GBPSave up to £3,412 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+
1.70ct Round
£3,083 GBP