Radiant|Natural|GIA

1.51ct H SI1 Radiant Natural Diamond

VG • H/SI1 • GIA 1557154271

Certificate GIA 1557154271

Diamond specifications and retailer prices

From $8,408 NZD
As of November 4, 2026
Save $7,273 NZD (46%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: $17,803 NZD at NZ Jewellers · As of October 6, 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 1557154271. Listed at 25 retailers as of November 1, 2026, with a 87% 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
H
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1557154271
Dimensions7.35 × 5.83 × 4.00 mm
L/W Ratio1.26
Culet sizeNone
Top View
7.35 mm5.83 mm1.51 ctH / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1557154271
Side View
Table 69.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 68.6%

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: $17,803 NZD|Low: $8,159 NZD|High: $17,803 NZD|Avg: $11,812 NZD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 7, 2026
Retailer 13$8,899 NZD
Retailer 4$9,038 NZD
Retailer 11$9,644 NZD
Retailer 5$9,728 NZD
Retailer 6$9,974 NZD
Retailer 12$10,206 NZD
Retailer 2$10,280 NZD
Retailer 3$11,126 NZD
Retailer 7$11,565 NZD
Retailer 8$12,986 NZD
Retailer 9$15,681 NZD
Retailer 10$17,251 NZD
NZ Jewellers$17,803 NZD

31 data points across 13 retailers

25 retailers$8,408 NZD to $15,681 NZD

A
Cheapest Retailer
-
$8,408 NZD
A
Retailer 2
-
$8,899 NZD
View
Final sale: no returns
A
Retailer 3
-
$8,974 NZD
View
A
Retailer 4
-
$9,038 NZD
View
B+
Retailer 5
-
$9,535 NZD
View
Retailer 6
-
$9,644 NZD
View
Price last confirmed 9 days ago
B+
Retailer 7
-
$9,644 NZD
View
Retailer 8
-
$9,644 NZD
View
Price last confirmed 16 days ago
B+
Retailer 9
-
$9,728 NZD
View
A
Retailer 10
-
$9,974 NZD
View
B+
Retailer 11
-
$10,206 NZD
View
B+
Retailer 12
-
$10,280 NZD
View
B+
Retailer 13
-
$10,372 NZD
View
B+
Retailer 14
-
$10,372 NZD
View
B+
Retailer 15
-
$10,715 NZD
View
B+
Retailer 16
-
$10,915 NZD
View
Retailer 17
-
$11,126 NZD
View
Price last confirmed 29 days ago
Retailer 18
-
$11,126 NZD
View
Price last confirmed 17 days ago
B+
Retailer 19
-
$11,565 NZD
View
Retailer 20
-
$11,740 NZD
View
Price last confirmed 23 days ago
B
Retailer 21
-
$12,986 NZD
View
B
Retailer 22
-
$15,681 NZD
View
Retailer 23
-
$17,251 NZD
View
Price last confirmed 10 days ago
Retailer 24
-
$17,803 NZD
View
Price last confirmed 17 days ago
Most Expensive
NZ Jewellers
8be071d4-8e55-4112-a1c0-9c595306d580 · Oct 6
$17,803 NZD
$9,869 USD
View
Price last confirmed 31 days ago
24 more retailers have this diamond
Prices start from $8,408 NZDSave up to $7,273 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
$8,408 NZD