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Round|Lab Grown|IGI

1.00ct G SI1 Round Lab Grown Diamond

EX • G/SI1 • IGI LG487174470

Shape and cutting style on the report: Round brilliant

Certificate IGI LG487174470

Diamond specifications and retailer prices

From £384 GBP
$510 USD
As of October 28, 2026
Save £599 GBP (61%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £1,699 GBP at NZ Jewellers · As of October 27, 2026
View at NZ Jewellers

About this 1ct lab-grown round diamond

This 1ct lab-grown round sits in the classic one-carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG487174470 or 487174470. Listed at 12 retailers as of October 28, 2026, with a 156% 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

1.00
Carat
G
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle33.9°
Pavilion angle41.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG487174470
Dimensions6.40 × 6.36 × 3.97 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
6.40 mm6.36 mm1.00 ctG / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG487174470
Side View
Table 60.5%Crown 33.9°Girdle: Slightly ThickPavilion 41.6°Culet: NoneDepth 62.2%

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 28
Current: £961 GBP|Low: £384 GBP|High: £2,401 GBP|Avg: £916 GBP|+4.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 29, 2026
Retailer 6£384 GBP
Retailer 5£521 GBP
Retailer 9£583 GBP
Retailer 7£604 GBP
Retailer 10£738 GBP
Retailer 2£875 GBP
Retailer 1£961 GBP
Retailer 8£983 GBP
Retailer 4£1,488 GBP
Retailer 3£2,385 GBP

39 data points across 10 retailers

12 retailers£384 GBP to £983 GBP

B+
Cheapest Retailer
-
£384 GBP
$510 USD
B
Retailer 2
-
£521 GBP
$692 USD
View
B
Retailer 3
-
£567 GBP
$753 USD
View
B
Retailer 4
-
£583 GBP
$775 USD
View
Final sale: no returns
B
Retailer 5
-
£604 GBP
$803 USD
View
Price last confirmed 13 days ago
B
Retailer 6
-
£604 GBP
$803 USD
View
B
Retailer 7
-
£738 GBP
$980 USD
View
B
Retailer 8
-
£961 GBP
View
B
Retailer 9
-
£983 GBP
$1,306 USD
View
B
Retailer 10
-
£1,488 GBP
$1,977 USD
View
Price under review
Most Expensive
B
NZ Jewellers
db264300-efe3-4497-8db5-faf00fd44e4f · Oct 27
£1,699 GBP
$2,257 USD
View
Price under review
10 more retailers have this diamond
Prices start from £384 GBPSave up to £599 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+
1.00ct Round
£384 GBP