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Round|Lab Grown|IGI

27.40ct G VS1 Round Lab Grown Diamond

ID • G/VS1 • IGI LG770608891

Shape and cutting style on the report: Round brilliant

Certificate IGI LG770608891

Diamond specifications and retailer prices

From £13,934 GBP
$18,670 USD
As of October 31, 2026
Save £27,901 GBP (67%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £41,835 GBP at Taylor and Hart · As of October 30, 2026
View at Taylor and Hart

About this 27.4ct lab-grown round diamond

This 27.4ct lab-grown round sits in the over five carat band, graded G colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG770608891 or 770608891. Listed at 16 retailers as of October 30, 2026, with prices from £13,934 to £41,835, a £27,901 spread on the same certified stone. Taylor and Hart lists it at £41,835. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

27.40
Carat
G
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.6°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG770608891
Dimensions19.42 × 19.49 × 11.80 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
19.42 mm19.49 mm27.40 ctG / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG770608891
Side View
Table 58.0%Crown 34.6°Girdle: MediumPavilion 40.7°Culet: NoneDepth 60.7%

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 31
Current: £30,130 GBP|Low: £13,337 GBP|High: £57,247 GBP|Avg: £25,505 GBP|-45.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Taylor and Hart
October 31, 2026
Retailer 9£13,337 GBP
Retailer 3£13,934 GBP
Retailer 11£15,380 GBP
Retailer 4£15,462 GBP
Retailer 5£15,504 GBP
Retailer 10£17,578 GBP
Retailer 13£17,633 GBP
Retailer 2£17,841 GBP
Retailer 7£19,108 GBP
Retailer 6£25,613 GBP
Retailer 1£30,130 GBP
Retailer 8£33,448 GBP
Retailer 12£37,352 GBP
Retailer 14£41,608 GBP
Taylor and Hart£41,835 GBP

33 data points across 15 retailers

16 retailers£13,934 GBP to £41,835 GBP

Retailer 1
-
£13,337 GBP
Price last confirmed 14 days ago
B+
Retailer 2
-
£13,934 GBP
$18,670 USD
View
B+
Retailer 3
-
£15,380 GBP
$20,608 USD
View
B+
Retailer 4
-
£15,462 GBP
$20,717 USD
View
B+
Retailer 5
-
£15,504 GBP
$20,773 USD
View
B
Retailer 6
-
£17,578 GBP
$23,552 USD
View
B
Retailer 7
-
£17,633 GBP
$23,626 USD
View
Retailer 8
-
£17,841 GBP
$23,905 USD
View
Price last confirmed 18 days ago
B
Retailer 9
-
£17,841 GBP
$23,905 USD
View
B
Retailer 10
-
£19,108 GBP
View
Retailer 11
-
£25,613 GBP
$34,319 USD
View
Price last confirmed 72 days ago
B
Retailer 12
-
£30,130 GBP
€38,449 EUR
View
Retailer 13
-
£33,448 GBP
A$68,948 AUD
View
Price last confirmed 8 days ago
B
Retailer 14
-
£37,352 GBP
$50,048 USD
View
B
Retailer 15
-
£41,608 GBP
$55,750 USD
View
Most Expensive
B
Taylor and Hart
AQIMONT · Oct 30
£41,835 GBP
$56,054 USD
View
15 more retailers have this diamond
Prices start from £13,934 GBPSave up to £27,901 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+
27.40ct Round
£13,934 GBP