Radiant|Lab Grown|IGI

1.64ct D IF Radiant Lab Grown Diamond

EX • D/IF • IGI LG705509687

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

Certificate IGI LG705509687

Diamond specifications and retailer prices

From $616 NZD
$347 USD
As of November 1, 2026
Save $5,346 NZD (90%) vs most expensive(unlock to see where)
28 retailers carry this diamond
Most expensive: $6,991 NZD at Brilliant Earth · As of October 24, 2026
View at Brilliant Earth

About this 1.64ct lab-grown radiant diamond

This 1.64ct 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 LG705509687 or 705509687. Listed at 28 retailers as of October 31, 2026, with a 868% 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

1.64
Carat
D
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.7°
Pavilion angle33.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG705509687
Dimensions8.89 × 5.91 × 3.77 mm
L/W Ratio1.50
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
8.89 mm5.91 mm1.64 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG705509687
Side View
Table 60.0%Crown 38.7°Girdle: MediumPavilion 33.1°Culet: NoneDepth 63.8%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 1
Current: $5,962 NZD|Low: $607 NZD|High: $7,328 NZD|Avg: $2,274 NZD|-18.6%
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
Retailer 23
Retailer 24
November 1, 2026
Retailer 12$607 NZD
Retailer 7$616 NZD
Retailer 10$704 NZD
Retailer 16$752 NZD
Retailer 6$954 NZD
Retailer 22$958 NZD
Retailer 13$992 NZD
Retailer 23$1,150 NZD
Retailer 11$1,258 NZD
Retailer 21$1,294 NZD
Retailer 18$1,351 NZD
Retailer 5$1,631 NZD
Retailer 19$1,747 NZD
Retailer 3$2,095 NZD
Retailer 14$2,420 NZD
Retailer 17$2,496 NZD
Retailer 4$2,621 NZD
Retailer 8$2,732 NZD
Retailer 9$2,765 NZD
Retailer 15$2,920 NZD
Retailer 2$3,017 NZD
Retailer 24$4,879 NZD
Retailer 20$4,915 NZD
Brilliant Earth$5,962 NZD

33 data points across 24 retailers

28 retailers$616 NZD to $5,962 NZD

Retailer 1
-
$607 NZD
$342 USD
Price last confirmed 11 days ago
A
Retailer 2
-
$616 NZD
$347 USD
View
Final sale: no returns
Retailer 3
-
$704 NZD
$397 USD
View
Price last confirmed 12 days ago
Retailer 4
-
$752 NZD
$424 USD
View
Price last confirmed 16 days ago
Retailer 5
-
$752 NZD
$424 USD
View
Price last confirmed 10 days ago
A
Retailer 6
-
$954 NZD
HK$4,200 HKD
View
A
Retailer 7
-
$958 NZD
$540 USD
View
A
Retailer 8
-
$992 NZD
$559 USD
View
A
Retailer 9
-
$1,150 NZD
$648 USD
View
Retailer 10
-
$1,258 NZD
€675 EUR
View
Price last confirmed 9 days ago
A
Retailer 11
-
$1,294 NZD
ZAR 11,779 ZAR
View
A
Retailer 12
-
$1,351 NZD
£600 GBP
View
A
Retailer 13
-
$1,631 NZD
$919 USD
View
A
Retailer 14
-
$1,747 NZD
A$1,515 AUD
View
B+
Retailer 15
-
$2,095 NZD
$1,181 USD
View
Retailer 16
-
$2,420 NZD
$1,364 USD
View
Price last confirmed 10 days ago
B+
Retailer 17
-
$2,496 NZD
$1,407 USD
View
B+
Retailer 18
-
$2,571 NZD
$1,449 USD
View
B+
Retailer 19
-
$2,621 NZD
$1,477 USD
View
B+
Retailer 20
-
$2,732 NZD
$1,540 USD
View
B+
Retailer 21
-
$2,765 NZD
SGD 2,106 SGD
View
Retailer 22
-
$2,920 NZD
£1,296 GBP
View
Price last confirmed 11 days ago
B+
Retailer 23
-
$3,017 NZD
£1,339 GBP
View
B
Retailer 24
-
$4,879 NZD
$2,750 USD
View
B
Retailer 25
-
$4,915 NZD
$2,770 USD
View
B
Retailer 26
-
$5,363 NZD
£2,380 GBP
View
B
Retailer 27
-
$5,962 NZD
$3,360 USD
View
Most Expensive
Brilliant Earth
14166265A · Oct 24
$6,991 NZD
$3,940 USD
View
Price last confirmed 8 days ago
27 more retailers have this diamond
Prices start from $616 NZDSave up to $5,346 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
1.64ct Radiant
$616 NZD