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Round|Lab Grown|IGI

1.70ct J SI1 Round Lab Grown Diamond

ID • J/SI1 • IGI LG470151246

Shape and cutting style on the report: Round brilliant

Certificate IGI LG470151246

Diamond specifications and retailer prices

From £322 GBP
$432 USD
As of October 30, 2026
Save £1,648 GBP (84%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £1,970 GBP at Do Amore Diamonds · As of October 29, 2026
View at Do Amore Diamonds

About this 1.7ct lab-grown round diamond

This 1.7ct lab-grown round sits in the one-and-a-half to two carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG470151246 or 470151246. Listed at 12 retailers as of October 29, 2026, with prices from £322 to £1,970, a £1,648 spread on the same certified stone. Do Amore Diamonds lists it at £1,970. 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

1.70
Carat
J
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle35.5°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG470151246
Dimensions7.68 × 7.64 × 4.73 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
7.68 mm7.64 mm1.70 ctJ / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG470151246
Side View
Table 57.5%Crown 35.5°Girdle: MED-STKPavilion 41°Culet: NoneDepth 61.8%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £1,970 GBP|Low: £312 GBP|High: £1,970 GBP|Avg: £701 GBP
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 29, 2026
Retailer 4£322 GBP
Retailer 8£445 GBP
Retailer 5£451 GBP
Retailer 6£630 GBP
Retailer 3£846 GBP
Retailer 7£984 GBP
Retailer 2£1,224 GBP
Do Amore Diamonds£1,970 GBP

15 data points across 8 retailers

12 retailers£322 GBP to £1,970 GBP

Retailer 1
-
£173 GBP
$232 USD
Price last confirmed 38 days ago
Retailer 2
-
£201 GBP
$269 USD
View
Price last confirmed 38 days ago
Retailer 3
-
£212 GBP
$284 USD
View
Price last confirmed 39 days ago
A
Retailer 4
-
£322 GBP
$432 USD
View
A
Retailer 5
-
£392 GBP
$525 USD
View
B+
Retailer 6
-
£451 GBP
$604 USD
View
A
Retailer 7
-
£630 GBP
$845 USD
View
Retailer 8
-
£763 GBP
$1,022 USD
View
Price last confirmed 39 days ago
B+
Retailer 9
-
£846 GBP
$1,133 USD
View
B+
Retailer 10
-
£984 GBP
$1,319 USD
View
B
Retailer 11
-
£1,224 GBP
View
Most Expensive
B
Do Amore Diamonds
27-831F1B287 · Oct 29
£1,970 GBP
$2,640 USD
View
11 more retailers have this diamond
Prices start from £322 GBPSave up to £1,648 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
1.70ct Round
£322 GBP