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Marquise|Natural|GIA

1.51ct I SI1 Marquise Natural Diamond

GD • I/SI1 • GIA 6555854230

Certificate GIA 6555854230

Diamond specifications and retailer prices

From $6,845 USD
As of November 1, 2026
Save $8,121 USD (54%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $14,966 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 6555854230. Listed at 18 retailers as of October 30, 2026, with prices from $6,845 to $14,966, a $8,121 spread on the same certified stone. NZ Jewellers lists it at $14,966. 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
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6555854230
Dimensions10.71 × 5.96 × 3.96 mm
L/W Ratio1.80
Culet sizeNone
Top View
10.71 mm5.96 mm1.51 ctI / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6555854230
Side View
Table 55.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 66.5%

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: $14,966 USD|Low: $6,625 USD|High: $14,966 USD|Avg: $9,035 USD
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 14$6,845 USD
Retailer 3$7,006 USD
Retailer 9$7,093 USD
Retailer 7$7,465 USD
Retailer 4$7,482 USD
Retailer 17$7,483 USD
Retailer 10$7,972 USD
Retailer 19$8,106 USD
Retailer 5$8,231 USD
Retailer 13$8,274 USD
Retailer 2$8,490 USD
Retailer 8$8,501 USD
Retailer 6$8,836 USD
Retailer 18$9,353 USD
Retailer 12$9,774 USD
Retailer 11$9,853 USD
Retailer 16$10,993 USD
Retailer 15$12,470 USD
NZ Jewellers$14,966 USD

16 data points across 19 retailers

18 retailers$6,845 USD to $14,966 USD

B+
Cheapest Retailer
-
$6,845 USD
B+
Retailer 2
-
$7,006 USD
View
B+
Retailer 3
-
$7,093 USD
View
B+
Retailer 4
-
$7,465 USD
View
B+
Retailer 5
-
$7,482 USD
View
Final sale: no returns
B+
Retailer 6
-
$7,483 USD
View
B
Retailer 7
-
$7,972 USD
View
B
Retailer 8
-
$8,106 USD
View
B
Retailer 9
-
$8,231 USD
View
B+
Retailer 10
-
$8,274 USD
£6,515 GBP
View
B
Retailer 11
-
$8,490 USD
£6,685 GBP
View
Retailer 12
-
$8,501 USD
A$13,078 AUD
View
Price last confirmed 33 days ago
B
Retailer 13
-
$8,836 USD
View
B
Retailer 14
-
$9,353 USD
View
B
Retailer 15
-
$9,774 USD
€9,309 EUR
View
B
Retailer 16
-
$10,993 USD
ZAR 177,588 ZAR
View
B
Retailer 17
-
$12,470 USD
£9,819 GBP
View
Most Expensive
C
NZ Jewellers
3e8021c5-b628-48f2-a70b-ff429de73b5f · Oct 30
$14,966 USD
View
17 more retailers have this diamond
Prices start from $6,845 USDSave up to $8,121 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.

B+
1.51ct Marquise
$6,845 USD