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Round|Natural|GIA

1.51ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 6555735876

Certificate GIA 6555735876

Diamond specifications and retailer prices

From $10,920 NZD
HK$48,000 HKD
As of November 1, 2026
Save $13,897 NZD (56%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $24,816 NZD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6555735876. Listed at 20 retailers as of October 30, 2026, with prices from $10,920 to $24,816, a $13,897 spread on the same certified stone. NZ Jewellers lists it at $24,816. 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
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 6555735876
Dimensions7.25 × 7.29 × 4.55 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Crystal, Cloud, Feather, Needle
Top View
7.25 mm7.29 mm1.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6555735876
Side View
Table 58.0%Crown 36°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.6%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $24,816 NZD|Low: $10,829 NZD|High: $24,816 NZD|Avg: $15,213 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
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
November 2, 2026
Retailer 16$10,920 NZD
Retailer 7$11,723 NZD
Retailer 9$12,406 NZD
Retailer 5$12,409 NZD
Retailer 18$12,414 NZD
Retailer 3$13,442 NZD
Retailer 8$13,650 NZD
Retailer 13$13,911 NZD
Retailer 17$14,229 NZD
Retailer 12$14,769 NZD
Retailer 4$14,823 NZD
Retailer 10$14,823 NZD
Retailer 19$15,320 NZD
Retailer 6$15,510 NZD
Retailer 11$16,344 NZD
Retailer 2$16,442 NZD
Retailer 15$18,228 NZD
Retailer 14$20,678 NZD
NZ Jewellers$24,816 NZD

35 data points across 19 retailers

20 retailers$10,920 NZD to $24,816 NZD

B+
Cheapest Retailer
-
$10,920 NZD
HK$48,000 HKD
B+
Retailer 2
-
$11,148 NZD
A$9,650 AUD
View
B+
Retailer 3
-
$11,723 NZD
$6,596 USD
View
B+
Retailer 4
-
$12,406 NZD
$6,980 USD
View
Final sale: no returns
B+
Retailer 5
-
$12,409 NZD
$6,982 USD
View
B+
Retailer 6
-
$12,414 NZD
$6,985 USD
View
B
Retailer 7
-
$13,442 NZD
$7,563 USD
View
B+
Retailer 8
-
$13,650 NZD
$7,680 USD
View
B+
Retailer 9
-
$13,911 NZD
£6,163 GBP
View
Retailer 10
-
$14,229 NZD
A$12,317 AUD
View
Price last confirmed 11 days ago
B+
Retailer 11
-
$14,769 NZD
€7,914 EUR
View
B
Retailer 12
-
$14,823 NZD
$8,340 USD
View
B
Retailer 13
-
$14,823 NZD
$8,340 USD
View
B
Retailer 14
-
$15,320 NZD
$8,620 USD
View
B
Retailer 15
-
$15,510 NZD
$8,727 USD
View
Retailer 16
-
$16,344 NZD
$9,196 USD
View
Price last confirmed 10 days ago
B
Retailer 17
-
$16,442 NZD
£7,284 GBP
View
B
Retailer 18
-
$18,228 NZD
ZAR 165,691 ZAR
View
B
Retailer 19
-
$20,678 NZD
£9,161 GBP
View
Most Expensive
B
NZ Jewellers
709b4404-daec-4c0b-b654-fb474c7a1d60 · Oct 30
$24,816 NZD
$13,963 USD
View
19 more retailers have this diamond
Prices start from $10,920 NZDSave up to $13,897 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
$10,920 NZD