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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 $5,886 AUD
As of November 6, 2026
Save $3,806 AUD (39%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $9,692 AUD 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 $5,886 to $9,692, a $3,806 spread on the same certified stone. Cape Diamonds lists it at $9,692. 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
Colour
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: $9,692 AUD|Low: $5,886 AUD|High: $9,692 AUD|Avg: $8,241 AUD
Cape Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 3$5,886 AUD
Retailer 2$6,928 AUD
Retailer 7$7,674 AUD
Retailer 4$7,706 AUD
Retailer 9$7,941 AUD
Retailer 5$8,166 AUD
Retailer 6$8,939 AUD
Retailer 8$9,165 AUD
Cape Diamonds$9,692 AUD

2 data points across 9 retailers

9 retailers$5,886 AUD to $9,692 AUD

B+
Cheapest Retailer
-
$5,886 AUD
B+
Retailer 2
-
$6,928 AUD
View
B+
Retailer 3
-
$7,674 AUD
View
B+
Retailer 4
-
$7,706 AUD
View
B+
Retailer 5
-
$7,941 AUD
View
B+
Retailer 6
-
$8,166 AUD
View
B
Retailer 7
-
$8,939 AUD
View
B
Retailer 8
-
$9,165 AUD
View
Most Expensive
B
Cape Diamonds
cert_6565816984 · Nov 5
$9,692 AUD
ZAR 107,582 ZAR
View
8 more retailers have this diamond
Prices start from $5,886 AUDSave up to $3,806 AUD

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
$5,886 AUD