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Marquise|Lab Grown|IGI

1.77ct D IF Marquise Lab Grown Diamond

D/IF • IGI LG780661430

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG780661430

Diamond specifications and retailer prices

From $5,622 AUD
$3,940 USD
As of November 2, 2026
Save $1,152 AUD (17%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $6,774 AUD at Novita Diamonds · As of October 31, 2026
View at Novita Diamonds

About this 1.77ct lab-grown marquise diamond

This 1.77ct lab-grown marquise sits in the one-and-a-half to two carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless) and certified by IGI LG780661430 or 780661430. Listed at 2 retailers as of October 31, 2026, with prices from $5,622 to $6,774, a $1,152 spread on the same certified stone. Novita Diamonds lists it at $6,774. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.77
Carat
D
Colour
IF
Clarity
-
Cut

Specifications

Cut
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.4°
Pavilion angle39.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG780661430
Dimensions12.51 × 6.40 × 3.86 mm
L/W Ratio1.95
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
12.51 mm6.40 mm1.77 ctD / IF
OriginLab Grown
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG780661430
Side View
Table 59.0%Crown 33.4°Girdle: MED-THKPavilion 39.2°Culet: NoneDepth 60.3%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 2
Current: $6,774 AUD|Low: $1,375 AUD|High: $11,344 AUD|Avg: $4,527 AUD|+3.1%
Novita Diamonds
Retailer 2
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Retailer 8
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Retailer 11
Retailer 12
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Retailer 16
October 31, 2026
Retailer 5$1,375 AUD
Retailer 9$1,635 AUD
Retailer 11$2,088 AUD
Retailer 13$2,276 AUD
Retailer 10$2,639 AUD
Retailer 16$3,205 AUD
Retailer 6$3,639 AUD
Retailer 3$3,693 AUD
Retailer 8$3,817 AUD
Retailer 7$3,888 AUD
Retailer 15$5,622 AUD
Retailer 2$6,068 AUD
Retailer 4$6,752 AUD
Novita Diamonds$6,774 AUD
Retailer 14$7,600 AUD
Retailer 12$11,344 AUD

6 data points across 16 retailers

2 retailers$5,622 AUD to $6,774 AUD

B
Cheapest Retailer
-
$5,622 AUD
$3,940 USD
Most Expensive
B
Novita Diamonds
cert_780661430 · Oct 31
$6,774 AUD
View
1 more retailer has this diamond
Prices start from $5,622 AUDSave up to $1,152 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.

B
1.77ct Marquise
$5,622 AUD