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Radiant|Lab Grown|IGI

1.55ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG689566199

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG689566199

Diamond specifications and retailer prices

From $449 AUD
As of November 4, 2026
Save $1,775 AUD (80%) vs most expensive(unlock to see where)
29 retailers carry this diamond
Most expensive: $3,671 AUD at Rare Carat · As of October 28, 2026
View at Rare Carat

About this 1.55ct lab-grown radiant diamond

This 1.55ct lab-grown radiant 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 LG689566199 or 689566199. Listed at 29 retailers as of November 4, 2026, with a 395% 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

1.55
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.9°
Pavilion angle33.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG689566199
Dimensions8.31 × 5.87 × 3.80 mm
L/W Ratio1.42
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
8.31 mm5.87 mm1.55 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG689566199
Side View
Table 62.0%Crown 37.9°Girdle: MediumPavilion 33.2°Culet: NoneDepth 64.7%

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 4
Current: $3,671 AUD|Low: $449 AUD|High: $3,685 AUD|Avg: $1,560 AUD|-0.4%
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
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
Retailer 21
November 5, 2026
Retailer 17$449 AUD
Retailer 18$503 AUD
Retailer 16$639 AUD
Retailer 15$777 AUD
Retailer 20$784 AUD
Retailer 7$907 AUD
Retailer 2$982 AUD
Retailer 11$999 AUD
Retailer 9$1,253 AUD
Retailer 5$1,307 AUD
Retailer 14$1,521 AUD
Retailer 21$1,634 AUD
Retailer 19$1,790 AUD
Retailer 6$1,852 AUD
Retailer 10$1,855 AUD
Retailer 4$1,865 AUD
Retailer 8$2,141 AUD
Retailer 3$2,224 AUD
Retailer 13$2,224 AUD
Retailer 12$2,405 AUD
Rare Carat$3,671 AUD

34 data points across 21 retailers

29 retailers$449 AUD to $2,224 AUD

A
Cheapest Retailer
-
$449 AUD
Retailer 2
-
$468 AUD
View
Price last confirmed 28 days ago
Retailer 3
-
$497 AUD
View
Price last confirmed 36 days ago
A
Retailer 4
-
$503 AUD
View
Final sale: no returns
Retailer 5
-
$577 AUD
View
Price last confirmed 39 days ago
Retailer 6
-
$580 AUD
View
Price last confirmed 33 days ago
Retailer 7
-
$609 AUD
View
Price last confirmed 37 days ago
A
Retailer 8
-
$639 AUD
View
A
Retailer 9
-
$777 AUD
View
A
Retailer 10
-
$784 AUD
View
A
Retailer 11
-
$907 AUD
View
A
Retailer 12
-
$948 AUD
View
A
Retailer 13
-
$982 AUD
View
A
Retailer 14
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$999 AUD
View
A
Retailer 15
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$1,253 AUD
View
A
Retailer 16
-
$1,307 AUD
View
B+
Retailer 17
-
$1,521 AUD
View
B+
Retailer 18
-
$1,634 AUD
View
B+
Retailer 19
-
$1,790 AUD
View
B+
Retailer 20
-
$1,852 AUD
View
B+
Retailer 21
-
$1,855 AUD
View
Retailer 22
-
$1,865 AUD
View
Price last confirmed 26 days ago
B+
Retailer 23
-
$1,865 AUD
View
Retailer 24
-
$1,983 AUD
View
Price last confirmed 36 days ago
B+
Retailer 25
-
$2,141 AUD
View
B+
Retailer 26
-
$2,224 AUD
View
B+
Retailer 27
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$2,224 AUD
View
Retailer 28
-
$2,405 AUD
View
Price last confirmed 28 days ago
Most Expensive
Rare Carat
1169-63-s · Oct 28
$3,671 AUD
$2,575 USD
View
Price last confirmed 7 days ago
28 more retailers have this diamond
Prices start from $449 AUDSave up to $1,775 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
1.55ct Radiant
$449 AUD