Radiant|Natural|GIA

1.51ct K SI1 Radiant Natural Diamond

VG • K/SI1 • GIA 6525056251

Certificate GIA 6525056251

Diamond specifications and retailer prices

From $4,991 NZD
As of November 4, 2026
Save $5,271 NZD (51%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $10,721 NZD at NZ Jewellers · As of October 24, 2026
View at NZ Jewellers

About this 1.51ct natural radiant diamond

This 1.51ct natural radiant sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 6525056251. Listed at 18 retailers as of November 4, 2026, with a 106% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.51
Carat
K
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6525056251
Dimensions7.57 × 5.58 × 3.88 mm
L/W Ratio1.36
Top View
7.57 mm5.58 mm1.51 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6525056251
Side View
Table 67.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 69.5%

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 4
Current: $6,366 NZD|Low: $4,852 NZD|High: $10,414 NZD|Avg: $6,859 NZD|+0.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 7, 2026
Retailer 8$4,852 NZD
Retailer 6$5,614 NZD
Retailer 9$5,789 NZD
Retailer 2$5,969 NZD
Retailer 7$6,321 NZD
Retailer 1$6,366 NZD
Retailer 3$7,163 NZD
Retailer 4$7,510 NZD
Retailer 5$10,262 NZD

40 data points across 9 retailers

18 retailers$4,991 NZD to $10,262 NZD

Retailer 1
-
$4,852 NZD
Price last confirmed 17 days ago
A
Retailer 2
-
$4,991 NZD
View
A
Retailer 3
-
$4,997 NZD
View
A
Retailer 4
-
$5,235 NZD
View
Retailer 5
-
$5,574 NZD
View
Price last confirmed 12 days ago
Retailer 6
-
$5,574 NZD
View
Price last confirmed 13 days ago
B+
Retailer 7
-
$5,614 NZD
View
Retailer 8
-
$5,789 NZD
View
Price last confirmed 13 days ago
B+
Retailer 9
-
$5,859 NZD
View
A
Retailer 10
-
$5,969 NZD
View
B+
Retailer 11
-
$6,321 NZD
View
B+
Retailer 12
-
$6,366 NZD
View
Retailer 13
-
$6,433 NZD
View
Price last confirmed 15 days ago
Retailer 14
-
$6,974 NZD
View
Price last confirmed 15 days ago
B+
Retailer 15
-
$7,163 NZD
View
B+
Retailer 16
-
$7,510 NZD
View
B
Retailer 17
-
$10,262 NZD
View
Most Expensive
NZ Jewellers
b03f8a28-4be2-450e-9357-369d22c74ae1 · Oct 24
$10,721 NZD
$5,943 USD
View
Price last confirmed 13 days ago
17 more retailers have this diamond
Prices start from $4,991 NZDSave up to $5,271 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
1.51ct Radiant
$4,991 NZD