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Round|Lab Grown|IGI

1.68ct D IF Round Lab Grown Diamond

EX • D/IF • IGI LG800618698

Shape and cutting style on the report: Round brilliant

Certificate IGI LG800618698

Diamond specifications and retailer prices

From £277 GBP
$371 USD
As of November 1, 2026
Save £1,843 GBP (87%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £2,120 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.68ct lab-grown round diamond

This 1.68ct lab-grown round sits in the one-and-a-half to two carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG800618698 or 800618698. Listed at 22 retailers as of October 31, 2026, with prices from £277 to £2,120, a £1,843 spread on the same certified stone. Brilliant Earth lists it at £2,120. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.68
Carat
D
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.7°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG800618698
Dimensions7.56 × 7.53 × 4.77 mm
L/W Ratio1.00
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
7.56 mm7.53 mm1.68 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG800618698
Side View
Table 57.0%Crown 35.7°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 63.2%

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: Nov 1
Current: £2,120 GBP|Low: £277 GBP|High: £2,411 GBP|Avg: £807 GBP|-12.1%
Brilliant Earth
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
Retailer 15
Retailer 16
Retailer 17
November 1, 2026
Retailer 2£277 GBP
Retailer 9£311 GBP
Retailer 13£343 GBP
Retailer 6£345 GBP
Retailer 17£407 GBP
Retailer 5£461 GBP
Retailer 7£539 GBP
Retailer 16£593 GBP
Retailer 11£618 GBP
Retailer 14£801 GBP
Retailer 3£860 GBP
Retailer 8£879 GBP
Retailer 12£1,132 GBP
Retailer 10£1,297 GBP
Retailer 4£1,304 GBP
Retailer 15£1,355 GBP
Brilliant Earth£2,120 GBP

43 data points across 17 retailers

22 retailers£277 GBP to £2,120 GBP

A
Cheapest Retailer
-
£277 GBP
$371 USD
Retailer 2
-
£278 GBP
$373 USD
View
Price last confirmed 39 days ago
A
Retailer 3
-
£311 GBP
$417 USD
View
Final sale: no returns
Retailer 4
-
£323 GBP
$433 USD
View
Price last confirmed 40 days ago
Retailer 5
-
£340 GBP
$456 USD
View
Price last confirmed 37 days ago
A
Retailer 6
-
£343 GBP
$460 USD
View
Retailer 7
-
£345 GBP
$462 USD
View
Price last confirmed 7 days ago
A
Retailer 8
-
£407 GBP
$545 USD
View
A
Retailer 9
-
£461 GBP
$618 USD
View
A
Retailer 10
-
£539 GBP
$722 USD
View
A
Retailer 11
-
£593 GBP
ZAR 12,837 ZAR
View
A
Retailer 12
-
£618 GBP
View
A
Retailer 13
-
£801 GBP
A$1,651 AUD
View
B+
Retailer 14
-
£860 GBP
$1,152 USD
View
B+
Retailer 15
-
£879 GBP
$1,178 USD
View
Retailer 16
-
£896 GBP
$1,201 USD
View
Price last confirmed 46 days ago
B+
Retailer 17
-
£1,109 GBP
$1,486 USD
View
B+
Retailer 18
-
£1,132 GBP
$1,517 USD
View
B+
Retailer 19
-
£1,297 GBP
$1,738 USD
View
B+
Retailer 20
-
£1,304 GBP
$1,747 USD
View
B+
Retailer 21
-
£1,355 GBP
View
Most Expensive
B
Brilliant Earth
20477613A · Oct 31
£2,120 GBP
$2,840 USD
View
21 more retailers have this diamond
Prices start from £277 GBPSave up to £1,843 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
1.68ct Round
£277 GBP