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Round|Lab Grown|IGI

1.27ct D VS1 Round Lab Grown Diamond

EX • D/VS1 • IGI LG818678012

Shape and cutting style on the report: Round brilliant

Certificate IGI LG818678012

Diamond specifications and retailer prices

From £145 GBP
As of November 5, 2026
Save £730 GBP (83%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: £1,557 GBP at Queensmith · As of October 27, 2026
View at Queensmith

About this 1.27ct lab-grown round diamond

This 1.27ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG818678012 or 818678012. Listed at 23 retailers as of November 4, 2026, with a 504% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.27
Carat
D
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.2°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818678012
Dimensions7.02 × 6.98 × 4.17 mm
L/W Ratio1.01
Girdle conditionFaceted
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
7.02 mm6.98 mm1.27 ctD / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818678012
Side View
Table 63.0%Crown 34.2°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 59.5%

Caratlytics Score

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

Price History

Last verified: Nov 5
Current: £323 GBP|Low: £139 GBP|High: £849 GBP|Avg: £351 GBP|+4.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 5, 2026
Retailer 12£145 GBP
Retailer 11£161 GBP
Retailer 4£180 GBP
Retailer 3£241 GBP
Retailer 6£304 GBP
Retailer 10£310 GBP
Retailer 1£323 GBP
Retailer 8£331 GBP
Retailer 2£397 GBP
Retailer 9£437 GBP
Retailer 7£579 GBP
Retailer 5£837 GBP

42 data points across 12 retailers

23 retailers£145 GBP to £874 GBP

A
Cheapest Retailer
-
£145 GBP
A
Retailer 2
-
£161 GBP
View
Final sale: no returns
A
Retailer 3
-
£168 GBP
View
Retailer 4
-
£180 GBP
View
Price last confirmed 11 days ago
A
Retailer 5
-
£180 GBP
View
A
Retailer 6
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£199 GBP
View
B+
Retailer 7
-
£241 GBP
View
A
Retailer 8
-
£304 GBP
View
A
Retailer 9
-
£310 GBP
View
A
Retailer 10
-
£317 GBP
View
B+
Retailer 11
-
£323 GBP
View
B+
Retailer 12
-
£331 GBP
View
Retailer 13
-
£397 GBP
View
Price last confirmed 17 days ago
B+
Retailer 14
-
£437 GBP
View
B+
Retailer 15
-
£467 GBP
View
B
Retailer 16
-
£577 GBP
View
B
Retailer 17
-
£579 GBP
View
B
Retailer 18
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£583 GBP
View
B
Retailer 19
-
£606 GBP
View
B
Retailer 20
-
£617 GBP
View
B
Retailer 21
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£837 GBP
View
B
Retailer 22
-
£874 GBP
View
Most Expensive
Queensmith
LG818678012 · Oct 27
£1,557 GBP
View
Price under review
22 more retailers have this diamond
Prices start from £145 GBPSave up to £730 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
1.27ct Round
£145 GBP