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Round|Lab Grown|IGI

4.51ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG754594164

Shape and cutting style on the report: Round brilliant

Certificate IGI LG754594164

Diamond specifications and retailer prices

From $3,857 AUD
$2,709 USD
As of October 29, 2026
Save $22,679 AUD (85%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $26,536 AUD at Do Amore Diamonds · As of October 30, 2026
View at Do Amore Diamonds

About this 4.51ct lab-grown round diamond

This 4.51ct 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 LG754594164 or 754594164. Listed at 16 retailers as of October 29, 2026, with prices from $3,857 to $26,536, a $22,679 spread on the same certified stone. Do Amore Diamonds lists it at $26,536. 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

4.51
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG754594164
Dimensions10.70 × 10.74 × 6.45 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
10.70 mm10.74 mm4.51 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG754594164
Side View
Table 58.0%Crown 34°Girdle: MediumPavilion 40.8°Culet: NoneDepth 60.2%

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: Oct 29
Current: $26,536 AUD|Low: $3,800 AUD|High: $39,348 AUD|Avg: $10,477 AUD|-2.6%
Do Amore Diamonds
Retailer 2
Retailer 3
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Retailer 5
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Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
October 31, 2026
Retailer 14$3,857 AUD
Retailer 3$4,197 AUD
Retailer 8$4,433 AUD
Retailer 15$4,446 AUD
Retailer 17$6,171 AUD
Retailer 12$6,207 AUD
Retailer 7$6,255 AUD
Retailer 16$6,566 AUD
Retailer 13$6,963 AUD
Retailer 2$8,042 AUD
Retailer 9$8,521 AUD
Retailer 4$10,229 AUD
Retailer 5$10,881 AUD
Retailer 11$12,585 AUD
Retailer 6$17,345 AUD
Retailer 10$20,244 AUD
Do Amore Diamonds$26,536 AUD

35 data points across 17 retailers

16 retailers$3,857 AUD to $26,536 AUD

A
Cheapest Retailer
-
$3,857 AUD
$2,709 USD
A
Retailer 2
-
$4,197 AUD
$2,948 USD
View
A
Retailer 3
-
$4,433 AUD
$3,114 USD
View
Final sale: no returns
A
Retailer 4
-
$4,446 AUD
$3,123 USD
View
A
Retailer 5
-
$6,171 AUD
$4,335 USD
View
A
Retailer 6
-
$6,207 AUD
$4,360 USD
View
A
Retailer 7
-
$6,255 AUD
$4,394 USD
View
A
Retailer 8
-
$6,566 AUD
$4,612 USD
View
A
Retailer 9
-
$6,963 AUD
$4,891 USD
View
A
Retailer 10
-
$8,042 AUD
€5,380 EUR
View
B+
Retailer 11
-
$10,229 AUD
$7,185 USD
View
Retailer 12
-
$10,881 AUD
View
Price last confirmed 8 days ago
B+
Retailer 13
-
$12,585 AUD
£6,961 GBP
View
Retailer 14
-
$17,345 AUD
View
Price last confirmed 22 days ago
B+
Retailer 15
-
$20,244 AUD
$14,220 USD
View
Most Expensive
B
Do Amore Diamonds
27-EDBE1E8E5 · Oct 30
$26,536 AUD
$18,640 USD
View
15 more retailers have this diamond
Prices start from $3,857 AUDSave up to $22,679 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
4.51ct Round
$3,857 AUD