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Marquise|Natural|GIA

1.51ct H SI1 Marquise Natural Diamond

EX • H/SI1 • GIA 6555830427

Certificate GIA 6555830427

Diamond specifications and retailer prices

From $16,533 NZD
As of November 4, 2026
Save $14,911 NZD (47%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $31,444 NZD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise 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 stated by the retailer rather than the lab and certified by GIA 6555830427. Listed at 22 retailers as of November 4, 2026, with prices from $16,533 to $31,444, a $14,911 spread on the same certified stone. NZ Jewellers lists it at $31,444. 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 (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle39.8°
Pavilion angle39.44°
OriginNatural
Grading LabGIA
CertificateGIA 6555830427
Dimensions11.45 × 5.91 × 3.74 mm
L/W Ratio1.94
Culet sizeNone
Top View
11.45 mm5.91 mm1.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6555830427
Side View
Table 58.0%Crown 39.8°Girdle: STK-THKPavilion 39.44°Culet: NoneDepth 63.3%

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 4
Current: $20,184 NZD|Low: $16,533 NZD|High: $29,818 NZD|Avg: $22,728 NZD|-1.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 7, 2026
Retailer 6$16,533 NZD
Retailer 10$18,865 NZD
Retailer 1$20,184 NZD
Retailer 3$20,438 NZD
Retailer 8$20,492 NZD
Retailer 2$20,752 NZD
Retailer 11$21,042 NZD
Retailer 9$22,980 NZD
Retailer 7$23,673 NZD
Retailer 4$27,524 NZD
Retailer 5$29,386 NZD

46 data points across 11 retailers

22 retailers$16,533 NZD to $31,444 NZD

B+
Cheapest Retailer
-
$16,533 NZD
B+
Retailer 2
-
$17,503 NZD
View
B+
Retailer 3
-
$17,711 NZD
View
B
Retailer 4
-
$18,643 NZD
View
Retailer 5
-
$18,865 NZD
View
Price last confirmed 9 days ago
B
Retailer 6
-
$18,865 NZD
View
Final sale: no returns
B
Retailer 7
-
$20,184 NZD
View
B
Retailer 8
-
$20,438 NZD
View
Retailer 9
-
$20,492 NZD
View
Price last confirmed 15 days ago
B
Retailer 10
-
$20,752 NZD
View
B
Retailer 11
-
$21,042 NZD
View
B
Retailer 12
-
$22,062 NZD
View
B
Retailer 13
-
$22,062 NZD
View
B
Retailer 14
-
$22,477 NZD
View
B
Retailer 15
-
$22,801 NZD
View
B
Retailer 16
-
$22,980 NZD
View
B
Retailer 17
-
$23,582 NZD
View
B
Retailer 18
-
$23,673 NZD
View
Retailer 19
-
$24,822 NZD
View
Price last confirmed 15 days ago
B
Retailer 20
-
$27,524 NZD
View
B
Retailer 21
-
$29,386 NZD
View
Most Expensive
B
NZ Jewellers
ae7b53dc-56f9-4716-9037-2b4f7d008ff1 · Nov 5
$31,444 NZD
$17,431 USD
View
21 more retailers have this diamond
Prices start from $16,533 NZDSave up to $14,911 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 Marquise
$16,533 NZD