Round|Lab Grown|IGI

1.70ct G SI1 Round Lab Grown Diamond

EX • G/SI1 • IGI LG814634352

Shape and cutting style on the report: Round brilliant

Certificate IGI LG814634352

Diamond specifications and retailer prices

From £231 GBP
$310 USD
As of November 1, 2026
Save £514 GBP (69%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £853 GBP at Reve Diamonds · As of October 25, 2026
View at Reve 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 G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG814634352 or 814634352. Listed at 20 retailers as of November 1, 2026, with a 223% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
G
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle35.1°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG814634352
Dimensions7.64 × 7.59 × 4.66 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.64 mm7.59 mm1.70 ctG / SI1
OriginLab Grown
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG814634352
Side View
Table 62.0%Crown 35.1°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 61.1%

Caratlytics Score

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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: Nov 1
Current: £289 GBP|Low: £149 GBP|High: £1,000 GBP|Avg: £509 GBP|-24.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Reve Diamonds
November 2, 2026
Retailer 9£154 GBP
Retailer 2£231 GBP
Retailer 1£289 GBP
Retailer 5£307 GBP
Retailer 4£418 GBP
Retailer 8£420 GBP
Retailer 7£425 GBP
Retailer 10£589 GBP
Retailer 11£615 GBP
Retailer 3£745 GBP
Retailer 6£799 GBP
Reve Diamonds£853 GBP

37 data points across 12 retailers

20 retailers£231 GBP to £745 GBP

Retailer 1
-
£148 GBP
$198 USD
Price last confirmed 23 days ago
Retailer 2
-
£183 GBP
$245 USD
View
Price last confirmed 31 days ago
Retailer 3
-
£184 GBP
$247 USD
View
Price last confirmed 41 days ago
Retailer 4
-
£213 GBP
$286 USD
View
Price last confirmed 41 days ago
Retailer 5
-
£225 GBP
$302 USD
View
Price last confirmed 41 days ago
B+
Retailer 6
-
£231 GBP
$310 USD
View
A
Retailer 7
-
£289 GBP
€369 EUR
View
A
Retailer 8
-
£307 GBP
View
B+
Retailer 9
-
£407 GBP
$546 USD
View
B+
Retailer 10
-
£418 GBP
$561 USD
View
B+
Retailer 11
-
£420 GBP
$564 USD
View
Retailer 12
-
£425 GBP
$570 USD
View
Price last confirmed 7 days ago
Retailer 13
-
£586 GBP
$787 USD
View
Price last confirmed 26 days ago
B
Retailer 14
-
£589 GBP
$790 USD
View
Retailer 15
-
£615 GBP
$825 USD
View
Price last confirmed 12 days ago
Retailer 16
-
£733 GBP
$983 USD
View
Price last confirmed 42 days ago
B
Retailer 17
-
£745 GBP
$1,000 USD
View
Retailer 18
-
£768 GBP
$1,030 USD
View
Price last confirmed 34 days ago
Retailer 19
-
£799 GBP
View
Price last confirmed 7 days ago
Most Expensive
Reve Diamonds
0A7E478AC · Oct 25
£853 GBP
$1,145 USD
View
Price last confirmed 8 days ago
19 more retailers have this diamond
Prices start from £231 GBPSave up to £514 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
£231 GBP