CaratHunter
Plans
Marquise|Lab Grown|IGI

1.78ct G VS1 Marquise Lab Grown Diamond

ID • G/VS1 • IGI LG836666661

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG836666661

Diamond specifications and retailer prices

From $612 NZD
£271 GBP
As of November 2, 2026
Save $2,321 NZD (79%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $2,933 NZD at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

About this 1.78ct lab-grown marquise diamond

This 1.78ct lab-grown marquise sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG836666661 or 836666661. Listed at 12 retailers as of November 2, 2026, with prices from $612 to $2,933, a $2,321 spread on the same certified stone. Brilliant Earth lists it at $2,933. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.78
Carat
G
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG836666661
Dimensions11.86 × 6.55 × 4.04 mm
L/W Ratio1.81
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.86 mm6.55 mm1.78 ctG / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG836666661
Side View
Table 60.0%Crown 34.9°Girdle: MED-STKPavilion 40.2°Culet: NoneDepth 61.7%

Caratlytics Score

How it works →
A
Excellent
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: Nov 2
Current: $2,933 NZD|Low: $612 NZD|High: $3,875 NZD|Avg: $1,521 NZD|-24.3%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 3, 2026
Retailer 6$612 NZD
Retailer 4$883 NZD
Retailer 7$904 NZD
Retailer 9$939 NZD
Retailer 2$991 NZD
Retailer 10$1,136 NZD
Retailer 5$1,223 NZD
Retailer 12$1,688 NZD
Retailer 3$1,776 NZD
Retailer 8$2,099 NZD
Retailer 11$2,131 NZD
Brilliant Earth$2,933 NZD

17 data points across 12 retailers

12 retailers$612 NZD to $2,933 NZD

A
Cheapest Retailer
-
$612 NZD
£271 GBP
B+
Retailer 2
-
$883 NZD
$497 USD
View
A
Retailer 3
-
$904 NZD
ZAR 8,218 ZAR
View
A
Retailer 4
-
$939 NZD
€503 EUR
View
A
Retailer 5
-
$991 NZD
£439 GBP
View
A
Retailer 6
-
$1,136 NZD
$639 USD
View
A
Retailer 7
-
$1,223 NZD
A$1,059 AUD
View
B+
Retailer 8
-
$1,688 NZD
$950 USD
View
B+
Retailer 9
-
$1,776 NZD
$999 USD
View
B+
Retailer 10
-
$2,099 NZD
£930 GBP
View
B+
Retailer 11
-
$2,131 NZD
$1,199 USD
View
Most Expensive
B
Brilliant Earth
22163644A · Nov 2
$2,933 NZD
$1,650 USD
View
11 more retailers have this diamond
Prices start from $612 NZDSave up to $2,321 NZD

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
1.78ct Marquise
$612 NZD