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Marquise|Natural|GIA

1.51ct G SI1 Marquise Natural Diamond

EX • G/SI1 • GIA 6551543873

Certificate GIA 6551543873

Diamond specifications and retailer prices

From $16,835 NZD
$9,472 USD
As of November 1, 2026
Save $13,406 NZD (44%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $30,241 NZD at NZ Jewellers · As of October 30, 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 G 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 6551543873. Listed at 17 retailers as of October 30, 2026, with prices from $16,835 to $30,241, a $13,406 spread on the same certified stone. NZ Jewellers lists it at $30,241. 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
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36.97°
Pavilion angle41.43°
OriginNatural
Grading LabGIA
CertificateGIA 6551543873
Dimensions11.30 × 5.97 × 3.78 mm
L/W Ratio1.89
Culet sizeNone
Top View
11.30 mm5.97 mm1.51 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6551543873
Side View
Table 60.0%Crown 36.97°Girdle: THN-THKPavilion 41.43°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 1
Current: $20,444 NZD|Low: $19,437 NZD|High: $28,680 NZD|Avg: $22,346 NZD|-1.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 3$19,437 NZD
Retailer 9$19,657 NZD
Retailer 8$19,959 NZD
Retailer 7$20,177 NZD
Retailer 1$20,444 NZD
Retailer 6$20,805 NZD
Retailer 2$22,855 NZD
Retailer 5$26,657 NZD
Retailer 4$28,339 NZD

43 data points across 9 retailers

17 retailers$16,835 NZD to $30,241 NZD

B+
Cheapest Retailer
-
$16,835 NZD
$9,472 USD
B+
Retailer 2
-
$17,942 NZD
$10,095 USD
View
Retailer 3
-
$18,144 NZD
$10,209 USD
View
Price last confirmed 17 days ago
Retailer 4
-
$18,296 NZD
$10,294 USD
View
Price last confirmed 11 days ago
B+
Retailer 5
-
$19,355 NZD
$10,890 USD
View
B+
Retailer 6
-
$19,437 NZD
£8,611 GBP
View
B+
Retailer 7
-
$19,657 NZD
$11,060 USD
View
B
Retailer 8
-
$19,959 NZD
$11,230 USD
View
Retailer 9
-
$20,177 NZD
A$17,466 AUD
View
Price last confirmed 29 days ago
B+
Retailer 10
-
$20,444 NZD
£9,057 GBP
View
B+
Retailer 11
-
$20,805 NZD
$11,706 USD
View
B
Retailer 12
-
$22,680 NZD
$12,761 USD
View
B
Retailer 13
-
$22,855 NZD
€12,247 EUR
View
Retailer 14
-
$23,871 NZD
$13,431 USD
View
Price last confirmed 10 days ago
B
Retailer 15
-
$26,657 NZD
ZAR 242,301 ZAR
View
B
Retailer 16
-
$28,339 NZD
£12,555 GBP
View
Most Expensive
B
NZ Jewellers
04e58fd2-03b5-4f0a-8a02-4f720a580b04 · Oct 30
$30,241 NZD
$17,015 USD
View
16 more retailers have this diamond
Prices start from $16,835 NZDSave up to $13,406 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
$16,835 NZD