CaratHunter
Plans
Round|Natural|GIA

1.51ct H SI2 Round Natural Diamond

EX • H/SI2 • GIA 2125868320

Certificate GIA 2125868320

Diamond specifications and retailer prices

From $15,454 NZD
$8,695 USD
As of November 1, 2026
Save $14,953 NZD (49%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $30,407 NZD at Diamond Quarter · As of November 2, 2026
View at Diamond Quarter

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2125868320. Listed at 19 retailers as of November 1, 2026, with prices from $15,454 to $30,407, a $14,953 spread on the same certified stone. Diamond Quarter lists it at $30,407. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.51
Carat
H
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2125868320
Dimensions7.37 × 7.35 × 4.56 mm
L/W Ratio1.00
Culet sizeNone
Top View
7.37 mm7.35 mm1.51 ctH / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 2125868320
Side View
Table 57.0%CrownGirdle: MediumPavilionCulet: NoneDepth 62.0%

Caratlytics Score

How it works →
B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $20,819 NZD|Low: $14,469 NZD|High: $28,938 NZD|Avg: $20,682 NZD|+2.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 5$15,454 NZD
Retailer 6$17,362 NZD
Retailer 9$17,362 NZD
Retailer 10$18,811 NZD
Retailer 3$18,880 NZD
Retailer 7$19,099 NZD
Retailer 1$20,819 NZD
Retailer 8$21,704 NZD
Retailer 4$27,118 NZD
Retailer 2$28,938 NZD

39 data points across 10 retailers

19 retailers$15,454 NZD to $30,407 NZD

B
Cheapest Retailer
-
$15,454 NZD
$8,695 USD
B
Retailer 2
-
$15,795 NZD
$8,887 USD
View
B
Retailer 3
-
$16,109 NZD
$9,064 USD
View
B
Retailer 4
-
$16,711 NZD
CA$13,059 CAD
View
B
Retailer 5
-
$17,362 NZD
$9,769 USD
View
B
Retailer 6
-
$17,362 NZD
$9,769 USD
View
Final sale: no returns
B
Retailer 7
-
$18,811 NZD
$10,584 USD
View
B
Retailer 8
-
$18,880 NZD
£8,364 GBP
View
B
Retailer 9
-
$19,099 NZD
$10,746 USD
View
B
Retailer 10
-
$20,034 NZD
$11,272 USD
View
B
Retailer 11
-
$20,368 NZD
$11,460 USD
View
B
Retailer 12
-
$20,368 NZD
$11,460 USD
View
B
Retailer 13
-
$20,819 NZD
€11,156 EUR
View
B
Retailer 14
-
$21,061 NZD
$11,850 USD
View
B
Retailer 15
-
$21,704 NZD
$12,212 USD
View
Retailer 16
-
$22,849 NZD
$12,856 USD
View
Price last confirmed 10 days ago
B
Retailer 17
-
$27,118 NZD
£12,014 GBP
View
B
Retailer 18
-
$28,938 NZD
$16,282 USD
View
Most Expensive
B
Diamond Quarter
1.51SI2H2120A7B6N · Nov 2
$30,407 NZD
£13,471 GBP
View
18 more retailers have this diamond
Prices start from $15,454 NZDSave up to $14,953 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.

B
1.51ct Round
$15,454 NZD