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Round|Lab Grown|IGI

1.20ct D SI1 Round Lab Grown Diamond

EX • D/SI1 • IGI LG786633849

Shape and cutting style on the report: Round brilliant

Certificate IGI LG786633849

Diamond specifications and retailer prices

From £130 GBP
$173 USD
As of October 29, 2026
Save £702 GBP (84%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £832 GBP at Reve Diamonds · As of October 30, 2026
View at Reve Diamonds

About this 1.2ct lab-grown round diamond

This 1.2ct lab-grown round sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG786633849 or 786633849. Listed at 19 retailers as of October 29, 2026, with prices from £130 to £832, a £702 spread on the same certified stone. Reve Diamonds lists it at £832. 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

1.20
Carat
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.8°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG786633849
Dimensions6.74 × 6.80 × 4.20 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
6.74 mm6.80 mm1.20 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG786633849
Side View
Table 57.0%Crown 34.8°Girdle: Slightly ThickPavilion 40.6°Culet: NoneDepth 62.0%

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: Oct 29
Current: £287 GBP|Low: £103 GBP|High: £762 GBP|Avg: £330 GBP|+6.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 30, 2026
Retailer 9£145 GBP
Retailer 2£151 GBP
Retailer 4£183 GBP
Retailer 10£218 GBP
Retailer 3£281 GBP
Retailer 1£287 GBP
Retailer 5£300 GBP
Retailer 12£348 GBP
Retailer 7£353 GBP
Retailer 8£403 GBP
Retailer 11£571 GBP
Retailer 6£754 GBP

42 data points across 12 retailers

19 retailers£130 GBP to £832 GBP

A
Cheapest Retailer
-
£130 GBP
$173 USD
A
Retailer 2
-
£145 GBP
$193 USD
View
Final sale: no returns
A
Retailer 3
-
£151 GBP
$201 USD
View
A
Retailer 4
-
£161 GBP
$214 USD
View
A
Retailer 5
-
£161 GBP
$214 USD
View
A
Retailer 6
-
£183 GBP
HK$1,900 HKD
View
B+
Retailer 7
-
£218 GBP
$290 USD
View
B+
Retailer 8
-
£281 GBP
$374 USD
View
B+
Retailer 9
-
£287 GBP
View
B+
Retailer 10
-
£300 GBP
€381 EUR
View
B+
Retailer 11
-
£348 GBP
$463 USD
View
Retailer 12
-
£353 GBP
$470 USD
View
Price last confirmed 8 days ago
B
Retailer 13
-
£403 GBP
$537 USD
View
B
Retailer 14
-
£517 GBP
$689 USD
View
B
Retailer 15
-
£528 GBP
SGD 951 SGD
View
B
Retailer 16
-
£559 GBP
$744 USD
View
B
Retailer 17
-
£571 GBP
$760 USD
View
B
Retailer 18
-
£754 GBP
View
Most Expensive
B
Reve Diamonds
AF34E0DA2 · Oct 30
£832 GBP
$1,107 USD
View
18 more retailers have this diamond
Prices start from £130 GBPSave up to £702 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
1.20ct Round
£130 GBP