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Round|Lab Grown|IGI

4.18ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG683520148

Shape and cutting style on the report: Round brilliant

Certificate IGI LG683520148

Diamond specifications and retailer prices

From $2,625 AUD
£1,452 GBP
As of October 30, 2026
Save $19,882 AUD (88%) vs most expensive(unlock to see where)
28 retailers carry this diamond
Most expensive: $22,507 AUD at Brilliant Earth · As of October 24, 2026
View at Brilliant Earth

About this 4.18ct lab-grown round diamond

This 4.18ct lab-grown round sits in the three to five carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG683520148 or 683520148. Listed at 28 retailers as of October 24, 2026, with prices from $2,625 to $22,507, a $19,882 spread on the same certified stone. Brilliant Earth lists it at $22,507. 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

4.18
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.6°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG683520148
Dimensions10.53 × 10.48 × 6.25 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
HEARTS & ARROWS 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
10.53 mm10.48 mm4.18 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG683520148
Side View
Table 58.0%Crown 33.6°Girdle: MediumPavilion 40.4°Culet: NoneDepth 59.5%

Caratlytics Score

How it works →
A+
Exceptional
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: Oct 30
Current: $18,706 AUD|Low: $2,616 AUD|High: $22,507 AUD|Avg: $6,962 AUD|-16.9%
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
Retailer 18
Retailer 19
Retailer 20
Retailer 21
Retailer 22
October 31, 2026
Retailer 16$2,625 AUD
Retailer 14$2,917 AUD
Retailer 6$2,960 AUD
Retailer 8$3,065 AUD
Retailer 15$3,173 AUD
Retailer 13$3,303 AUD
Retailer 21$3,385 AUD
Retailer 5$4,009 AUD
Retailer 2$4,637 AUD
Retailer 20$4,805 AUD
Retailer 4$5,094 AUD
Retailer 3$5,156 AUD
Retailer 18$6,625 AUD
Retailer 17$7,203 AUD
Retailer 12$7,261 AUD
Retailer 10$8,260 AUD
Retailer 19$8,613 AUD
Retailer 9$8,691 AUD
Retailer 7$9,676 AUD
Retailer 11$11,600 AUD
Retailer 22$18,179 AUD
Brilliant Earth$18,706 AUD

29 data points across 22 retailers

28 retailers$2,625 AUD to $22,507 AUD

A+
Cheapest Retailer
-
$2,625 AUD
£1,452 GBP
Retailer 2
-
$2,917 AUD
$2,049 USD
View
Price last confirmed 8 days ago
A
Retailer 3
-
$2,960 AUD
$2,079 USD
View
Final sale: no returns
A
Retailer 4
-
$3,065 AUD
$2,153 USD
View
Retailer 5
-
$3,173 AUD
$2,229 USD
View
Price last confirmed 11 days ago
A
Retailer 6
-
$3,303 AUD
$2,320 USD
View
Retailer 7
-
$3,384 AUD
$2,377 USD
View
Price last confirmed 20 days ago
A
Retailer 8
-
$3,385 AUD
$2,378 USD
View
A
Retailer 9
-
$4,009 AUD
HK$22,000 HKD
View
A
Retailer 10
-
$4,637 AUD
£2,565 GBP
View
Retailer 11
-
$4,651 AUD
$3,267 USD
View
Price last confirmed 10 days ago
A
Retailer 12
-
$4,805 AUD
$3,375 USD
View
A
Retailer 13
-
$5,094 AUD
$3,578 USD
View
A
Retailer 14
-
$5,156 AUD
$3,622 USD
View
A
Retailer 15
-
$6,625 AUD
€4,432 EUR
View
A
Retailer 16
-
$7,203 AUD
ZAR 81,735 ZAR
View
Retailer 17
-
$7,261 AUD
View
Price last confirmed 9 days ago
A
Retailer 18
-
$8,260 AUD
$5,802 USD
View
B+
Retailer 19
-
$8,613 AUD
$6,050 USD
View
A
Retailer 20
-
$8,691 AUD
$6,105 USD
View
B+
Retailer 21
-
$9,520 AUD
$6,687 USD
View
B+
Retailer 22
-
$9,676 AUD
£5,352 GBP
View
B+
Retailer 23
-
$11,600 AUD
SGD 11,011 SGD
View
B+
Retailer 24
-
$11,837 AUD
$8,315 USD
View
Retailer 25
-
$13,415 AUD
£7,420 GBP
View
Price last confirmed 22 days ago
B
Retailer 26
-
$18,179 AUD
$12,770 USD
View
B+
Retailer 27
-
$18,706 AUD
$13,140 USD
View
Most Expensive
B
Brilliant Earth
13152316A · Oct 24
$22,507 AUD
$15,810 USD
View
27 more retailers have this diamond
Prices start from $2,625 AUDSave up to $19,882 AUD

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+
4.18ct Round
$2,625 AUD