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Marquise|Natural|GIA

1.51ct G SI1 Marquise Natural Diamond

VG • G/SI1 • GIA 1558829621

Certificate GIA 1558829621

Diamond specifications and retailer prices

From $16,381 NZD
As of November 6, 2026
Save $11,901 NZD (42%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $28,282 NZD at MOH London · As of November 4, 2026
View at MOH London

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 very-good cut grade stated by the retailer rather than the lab and certified by GIA 1558829621. Listed at 13 retailers as of November 4, 2026, with prices from $16,381 to $28,282, a $11,901 spread on the same certified stone. MOH London lists it at $28,282. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
G
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1558829621
Dimensions11.17 × 5.88 × 3.79 mm
L/W Ratio1.90
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Pinpoint
Top View
11.17 mm5.88 mm1.51 ctG / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1558829621
Side View
Table 60.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 64.4%

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 6
Current: $28,282 NZD|Low: $14,658 NZD|High: $28,660 NZD|Avg: $19,661 NZD|-1.2%
MOH London
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
November 6, 2026
Retailer 8$14,658 NZD
Retailer 5$16,381 NZD
Retailer 6$16,473 NZD
Retailer 11$17,512 NZD
Retailer 7$17,570 NZD
Retailer 4$17,718 NZD
Retailer 12$18,981 NZD
Retailer 10$19,610 NZD
Retailer 2$20,440 NZD
Retailer 15$21,171 NZD
Retailer 14$21,466 NZD
Retailer 16$21,466 NZD
Retailer 9$21,944 NZD
Retailer 3$22,188 NZD
Retailer 13$22,323 NZD
MOH London$28,282 NZD

9 data points across 16 retailers

13 retailers$16,381 NZD to $28,282 NZD

B+
Cheapest Retailer
-
$16,381 NZD
B+
Retailer 2
-
$17,512 NZD
View
B+
Retailer 3
-
$17,718 NZD
View
B
Retailer 4
-
$18,981 NZD
View
B+
Retailer 5
-
$19,610 NZD
View
B
Retailer 6
-
$20,440 NZD
View
B
Retailer 7
-
$21,171 NZD
View
B
Retailer 8
-
$21,466 NZD
View
B
Retailer 9
-
$21,466 NZD
View
B
Retailer 10
-
$21,944 NZD
View
B
Retailer 11
-
$22,188 NZD
View
B
Retailer 12
-
$22,323 NZD
View
Most Expensive
B
MOH London
941042344 · Nov 4
$28,282 NZD
£12,345 GBP
View
12 more retailers have this diamond
Prices start from $16,381 NZDSave up to $11,901 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
$16,381 NZD