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Round|Lab Grown|IGI

1.91ct F VS1 Round Lab Grown Diamond

ID • F/VS1 • IGI LG630443173

Shape and cutting style on the report: Round brilliant

Certificate IGI LG630443173

Diamond specifications and retailer prices

From £250 GBP
$335 USD
As of November 1, 2026
Save £859 GBP (77%) vs most expensive(unlock to see where)
26 retailers carry this diamond
Most expensive: £1,829 GBP at Brilliant Earth · As of October 4, 2026
View at Brilliant Earth

About this 1.91ct lab-grown round diamond

This 1.91ct lab-grown round sits in the one-and-a-half to two carat band, graded F colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG630443173 or 630443173. Listed at 26 retailers as of November 1, 2026, with a 344% 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

1.91
Carat
F
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.7°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG630443173
Dimensions7.89 × 7.95 × 4.93 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
7.89 mm7.95 mm1.91 ctF / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG630443173
Side View
Table 56.0%Crown 35.7°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.2%

Caratlytics Score

How it works →
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: £1,829 GBP|Low: £219 GBP|High: £1,829 GBP|Avg: £674 GBP
Brilliant Earth
Retailer 2
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Retailer 4
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Retailer 21
November 2, 2026
Retailer 10£228 GBP
Retailer 4£250 GBP
Retailer 12£282 GBP
Retailer 5£306 GBP
Retailer 21£372 GBP
Retailer 17£373 GBP
Retailer 16£451 GBP
Retailer 2£477 GBP
Retailer 3£482 GBP
Retailer 13£490 GBP
Retailer 18£508 GBP
Retailer 6£522 GBP
Retailer 19£643 GBP
Retailer 20£713 GBP
Retailer 8£885 GBP
Retailer 11£903 GBP
Retailer 14£923 GBP
Retailer 7£925 GBP
Retailer 9£1,064 GBP
Retailer 15£1,109 GBP
Brilliant Earth£1,829 GBP

39 data points across 21 retailers

26 retailers£250 GBP to £1,109 GBP

Retailer 1
-
£228 GBP
$305 USD
Price last confirmed 14 days ago
A
Retailer 2
-
£250 GBP
$335 USD
View
Final sale: no returns
Retailer 3
-
£264 GBP
$354 USD
View
Price last confirmed 12 days ago
Retailer 4
-
£279 GBP
$374 USD
View
Price last confirmed 47 days ago
Retailer 5
-
£282 GBP
$378 USD
View
Price last confirmed 16 days ago
Retailer 6
-
£282 GBP
$378 USD
View
Price last confirmed 13 days ago
A
Retailer 7
-
£306 GBP
HK$3,200 HKD
View
B+
Retailer 8
-
£372 GBP
$498 USD
View
A
Retailer 9
-
£373 GBP
$500 USD
View
A
Retailer 10
-
£451 GBP
€576 EUR
View
A
Retailer 11
-
£477 GBP
ZAR 10,325 ZAR
View
A
Retailer 12
-
£482 GBP
$646 USD
View
A
Retailer 13
-
£490 GBP
View
A
Retailer 14
-
£508 GBP
A$1,048 AUD
View
B+
Retailer 15
-
£522 GBP
$700 USD
View
B+
Retailer 16
-
£643 GBP
A$1,326 AUD
View
B+
Retailer 17
-
£713 GBP
$955 USD
View
B
Retailer 18
-
£885 GBP
SGD 1,603 SGD
View
Retailer 19
-
£903 GBP
$1,210 USD
View
Price last confirmed 25 days ago
Retailer 20
-
£908 GBP
$1,216 USD
View
Price last confirmed 14 days ago
Retailer 21
-
£923 GBP
A$1,903 AUD
View
Price last confirmed 27 days ago
B
Retailer 22
-
£925 GBP
$1,239 USD
View
B
Retailer 23
-
£972 GBP
$1,303 USD
View
B
Retailer 24
-
£1,064 GBP
$1,426 USD
View
B
Retailer 25
-
£1,109 GBP
View
Most Expensive
Brilliant Earth
9989183A · Oct 4
£1,829 GBP
$2,450 USD
View
Price last confirmed 28 days ago
25 more retailers have this diamond
Prices start from £250 GBPSave up to £859 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
1.91ct Round
£250 GBP