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Round|Lab Grown|IGI

1.68ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG683520864

Shape and cutting style on the report: Round brilliant

Certificate IGI LG683520864

Diamond specifications and retailer prices

From £290 GBP
$389 USD
As of October 30, 2026
Save £968 GBP (77%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £1,829 GBP at Rare Carat · As of October 25, 2026
View at Rare Carat

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 LG683520864 or 683520864. Listed at 22 retailers as of October 26, 2026, with a 334% 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

1.68
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.8°
Pavilion angle41.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG683520864
Dimensions7.66 × 7.63 × 4.69 mm
L/W Ratio1.00
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
7.66 mm7.63 mm1.68 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG683520864
Side View
Table 59.0%Crown 33.8°Girdle: MediumPavilion 41.3°Culet: NoneDepth 61.4%

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 30
Current: £1,829 GBP|Low: £290 GBP|High: £1,847 GBP|Avg: £738 GBP|-1.0%
Rare Carat
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
November 1, 2026
Retailer 4£290 GBP
Retailer 5£322 GBP
Retailer 2£412 GBP
Retailer 13£442 GBP
Retailer 10£444 GBP
Retailer 6£517 GBP
Retailer 9£553 GBP
Retailer 7£577 GBP
Retailer 8£747 GBP
Retailer 12£943 GBP
Retailer 3£1,216 GBP
Retailer 14£1,242 GBP
Retailer 11£1,259 GBP
Rare Carat£1,829 GBP

41 data points across 14 retailers

22 retailers£290 GBP to £1,259 GBP

Retailer 1
-
£249 GBP
$334 USD
Price last confirmed 24 days ago
Retailer 2
-
£260 GBP
$348 USD
View
Price last confirmed 39 days ago
A
Retailer 3
-
£290 GBP
$389 USD
View
Final sale: no returns
Retailer 4
-
£301 GBP
$403 USD
View
Price last confirmed 39 days ago
Retailer 5
-
£317 GBP
$425 USD
View
Price last confirmed 40 days ago
Retailer 6
-
£322 GBP
$431 USD
View
Price last confirmed 29 days ago
A
Retailer 7
-
£412 GBP
View
A
Retailer 8
-
£442 GBP
$592 USD
View
A
Retailer 9
-
£444 GBP
$595 USD
View
A
Retailer 10
-
£517 GBP
$693 USD
View
A
Retailer 11
-
£553 GBP
ZAR 11,964 ZAR
View
A
Retailer 12
-
£577 GBP
View
A
Retailer 13
-
£747 GBP
A$1,539 AUD
View
B+
Retailer 14
-
£872 GBP
$1,169 USD
View
B+
Retailer 15
-
£943 GBP
$1,264 USD
View
Retailer 16
-
£1,034 GBP
$1,385 USD
View
Price last confirmed 24 days ago
Retailer 17
-
£1,034 GBP
$1,385 USD
View
Price last confirmed 41 days ago
B+
Retailer 18
-
£1,065 GBP
$1,427 USD
View
B+
Retailer 19
-
£1,216 GBP
$1,629 USD
View
B+
Retailer 20
-
£1,242 GBP
$1,664 USD
View
B+
Retailer 21
-
£1,259 GBP
View
Most Expensive
Rare Carat
SS11634_l_683520864 · Oct 25
£1,829 GBP
$2,450 USD
View
Price last confirmed 7 days ago
21 more retailers have this diamond
Prices start from £290 GBPSave up to £968 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
£290 GBP