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Radiant|Lab Grown|IGI

2.57ct D FL Radiant Lab Grown Diamond

EX • D/FL

Diamond specifications and retailer prices

From $1,666 NZD
$939 USD
As of October 30, 2026
Save $9,656 NZD (85%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $11,322 NZD at Blue Nile · As of October 31, 2026
View at Blue Nile

About this 2.57ct lab-grown radiant diamond

This 2.57ct lab-grown radiant sits in the two to three carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI. Listed at 5 retailers as of October 30, 2026, with prices from $1,666 to $11,322, a $9,656 spread on the same certified stone. Blue Nile lists it at $11,322. 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

2.57
Carat
D
Colour
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
Dimensions9.37 × 6.81 × 4.71 mm
L/W Ratio1.38
Top View
9.37 mm6.81 mm2.57 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI
Side View
Table 65.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 69.2%

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: Oct 30
Current: $11,322 NZD|Low: $1,666 NZD|High: $18,442 NZD|Avg: $7,023 NZD|-11.6%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 28, 2026
Retailer 4$1,666 NZD
Retailer 3$1,813 NZD
Retailer 5$2,408 NZD
Retailer 2$3,999 NZD
Blue Nile$11,322 NZD
Retailer 6$18,442 NZD

11 data points across 6 retailers

5 retailers$1,666 NZD to $11,322 NZD

A
Cheapest Retailer
-
$1,666 NZD
$939 USD
A
Retailer 2
-
$1,813 NZD
$1,022 USD
View
A
Retailer 3
-
$2,408 NZD
$1,357 USD
View
A
Retailer 4
-
$3,999 NZD
$2,254 USD
View
Most Expensive
B
Blue Nile
30353931 · Oct 31
$11,322 NZD
$6,381 USD
View
4 more retailers have this diamond
Prices start from $1,666 NZDSave up to $9,656 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
2.57ct Radiant
$1,666 NZD