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Marquise|Natural|GIA

1.51ct K SI1 Marquise Natural Diamond

VG • K/SI1 • GIA 6565816984

Certificate GIA 6565816984

Diamond specifications and retailer prices

From $4,044 USD
As of November 6, 2026
Save $2,615 USD (39%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $6,659 USD at Cape Diamonds · As of November 5, 2026
View at Cape Diamonds

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 6565816984. Listed at 9 retailers as of November 5, 2026, with prices from $4,044 to $6,659, a $2,615 spread on the same certified stone. Cape Diamonds lists it at $6,659. 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
K
Color
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6565816984
Dimensions11.28 × 6.06 × 3.79 mm
L/W Ratio1.86
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Twinning Wisp, Feather, Indented Natural, Pinpoint
Top View
11.28 mm6.06 mm1.51 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6565816984
Side View
Table 62.0%CrownGirdlePavilionCulet: NDepth 62.6%

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: $6,659 USD|Low: $4,044 USD|High: $6,659 USD|Avg: $5,662 USD
Cape Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 3$4,044 USD
Retailer 2$4,760 USD
Retailer 7$5,273 USD
Retailer 4$5,295 USD
Retailer 9$5,456 USD
Retailer 5$5,611 USD
Retailer 6$6,142 USD
Retailer 8$6,297 USD
Cape Diamonds$6,659 USD

2 data points across 9 retailers

9 retailers$4,044 USD to $6,659 USD

B+
Cheapest Retailer
-
$4,044 USD
B+
Retailer 2
-
$4,760 USD
View
B+
Retailer 3
-
$5,273 USD
View
B+
Retailer 4
-
$5,295 USD
View
B+
Retailer 5
-
$5,456 USD
View
B+
Retailer 6
-
$5,611 USD
View
B
Retailer 7
-
$6,142 USD
View
B
Retailer 8
-
$6,297 USD
View
Most Expensive
B
Cape Diamonds
cert_6565816984 · Nov 5
$6,659 USD
ZAR 107,582 ZAR
View
8 more retailers have this diamond
Prices start from $4,044 USDSave up to $2,615 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
$4,044 USD