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Marquise|Natural|GIA

1.51ct I SI1 Marquise Natural Diamond

GD • I/SI1 • GIA 2554673570

Certificate GIA 2554673570

Diamond specifications and retailer prices

From $6,257 USD
As of November 1, 2026
Save $6,081 USD (49%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $12,338 USD 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 2554673570. Listed at 15 retailers as of October 30, 2026, with prices from $6,257 to $12,338, a $6,081 spread on the same certified stone. NZ Jewellers lists it at $12,338. 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
I
Color
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2554673570
Dimensions6.02 × 11.23 × 3.76 mm
L/W Ratio1.87
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Twinning Wisp, Crystal, Cloud, Feather, Needle
Top View
6.02 mm11.23 mm1.51 ctI / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2554673570
Side View
Table 54.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 62.5%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $12,338 USD|Low: $6,257 USD|High: $12,658 USD|Avg: $7,638 USD|-2.5%
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
November 2, 2026
Retailer 14$6,257 USD
Retailer 15$6,480 USD
Retailer 6$6,489 USD
Retailer 7$6,630 USD
Retailer 10$6,750 USD
Retailer 4$6,809 USD
Retailer 3$6,820 USD
Retailer 11$6,838 USD
Retailer 9$6,939 USD
Retailer 5$7,222 USD
Retailer 13$7,313 USD
Retailer 2$7,425 USD
Retailer 8$8,438 USD
Retailer 12$10,192 USD
NZ Jewellers$12,338 USD

31 data points across 15 retailers

15 retailers$6,257 USD to $12,338 USD

A
Cheapest Retailer
-
$6,257 USD
B+
Retailer 2
-
$6,480 USD
View
B+
Retailer 3
-
$6,489 USD
View
Retailer 4
-
$6,630 USD
SGD 8,959 SGD
View
Price last confirmed 21 days ago
B+
Retailer 5
-
$6,750 USD
View
Final sale: no returns
B+
Retailer 6
-
$6,809 USD
View
B+
Retailer 7
-
$6,820 USD
View
B+
Retailer 8
-
$6,838 USD
£5,385 GBP
View
B+
Retailer 9
-
$6,939 USD
£5,464 GBP
View
Retailer 10
-
$7,222 USD
A$11,111 AUD
View
Price last confirmed 11 days ago
B+
Retailer 11
-
$7,313 USD
View
B+
Retailer 12
-
$7,425 USD
View
B
Retailer 13
-
$8,438 USD
View
B
Retailer 14
-
$10,192 USD
£8,025 GBP
View
Most Expensive
B
NZ Jewellers
c49883fe-d6f6-4c4c-9c3e-40419c4a033f · Oct 30
$12,338 USD
View
14 more retailers have this diamond
Prices start from $6,257 USDSave up to $6,081 USD

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.

A
1.51ct Marquise
$6,257 USD