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Round|Natural|GIA

1.51ct I VS1 Round Natural Diamond

ID • I/VS1 • GIA 307

Certificate GIA 307

Diamond specifications and retailer prices

From $11,081 NZD
As of November 3, 2026
Save $7,208 NZD (39%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $18,289 NZD at Helzberg Diamonds · As of November 3, 2026
View at Helzberg Diamonds

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by GIA. Listed at 7 retailers as of November 3, 2026, with prices from $11,081 to $18,289, a $7,208 spread on the same certified stone. Helzberg Diamonds lists it at $18,289. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.51
Carat
I
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 307
Dimensions7.26 × 7.32 × 4.58 mm
L/W Ratio1.01
Top View
7.26 mm7.32 mm1.51 ctI / VS1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 307
Side View
Table 58.0%CrownGirdle: THN-STKPavilionCulet: NoneDepth 62.8%

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 3
Current: $18,289 NZD|Low: $11,081 NZD|High: $19,100 NZD|Avg: $14,284 NZD|-4.2%
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 28, 2026
Retailer 5$11,081 NZD
Retailer 4$11,759 NZD
Retailer 2$11,789 NZD
Retailer 3$11,952 NZD
Retailer 7$12,925 NZD
Retailer 6$14,036 NZD
Retailer 8$16,017 NZD
Retailer 9$17,986 NZD
Helzberg Diamonds$18,289 NZD

31 data points across 9 retailers

7 retailers$11,081 NZD to $18,289 NZD

A
Cheapest Retailer
-
$11,081 NZD
A
Retailer 2
-
$11,759 NZD
View
A
Retailer 3
-
$11,789 NZD
View
A
Retailer 4
-
$11,952 NZD
View
Retailer 5
-
$12,925 NZD
View
Price last confirmed 18 days ago
B+
Retailer 6
-
$14,036 NZD
View
Most Expensive
B+
Helzberg Diamonds
XZRMLMLHOHMPG · Nov 3
$18,289 NZD
$10,281 USD
View
6 more retailers have this diamond
Prices start from $11,081 NZDSave up to $7,208 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 Round
$11,081 NZD