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Marquise|Natural|GIA

0.51ct H SI1 Marquise Natural Diamond

EX • H/SI1 • GIA 2564717598

Certificate GIA 2564717598

Diamond specifications and retailer prices

From $1,280 NZD
SGD 973 SGD
As of October 31, 2026
Save $773 NZD (38%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $2,053 NZD at Frank Darling · As of November 2, 2026
View at Frank Darling

About this 0.51ct natural marquise diamond

This 0.51ct natural marquise sits in the half to three-quarter carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2564717598. Listed at 9 retailers as of October 31, 2026, with prices from $1,280 to $2,053, a $773 spread on the same certified stone. Frank Darling lists it at $2,053. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

0.51
Carat
H
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2564717598
Dimensions7.86 × 4.16 × 2.60 mm
L/W Ratio1.89
Culet sizeNone
Top View
7.86 mm4.16 mm0.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2564717598
Side View
Table 59.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 62.7%

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: Oct 31
Current: $2,053 NZD|Low: $1,280 NZD|High: $2,053 NZD|Avg: $1,606 NZD
Frank Darling
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 9$1,280 NZD
Retailer 5$1,310 NZD
Retailer 6$1,340 NZD
Retailer 7$1,376 NZD
Retailer 4$1,702 NZD
Retailer 2$1,764 NZD
Retailer 8$1,831 NZD
Retailer 3$1,919 NZD
Frank Darling$2,053 NZD

7 data points across 9 retailers

9 retailers$1,280 NZD to $2,053 NZD

B+
Cheapest Retailer
-
$1,280 NZD
SGD 973 SGD
B+
Retailer 2
-
$1,310 NZD
SGD 996 SGD
View
B+
Retailer 3
-
$1,340 NZD
$754 USD
View
B+
Retailer 4
-
$1,376 NZD
$774 USD
View
B
Retailer 5
-
$1,702 NZD
$958 USD
View
B
Retailer 6
-
$1,764 NZD
€945 EUR
View
B
Retailer 7
-
$1,831 NZD
$1,030 USD
View
B
Retailer 8
-
$1,919 NZD
$1,080 USD
View
Most Expensive
B
Frank Darling
2709605HK · Nov 2
$2,053 NZD
$1,155 USD
View
8 more retailers have this diamond
Prices start from $1,280 NZDSave up to $773 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+
0.51ct Marquise
$1,280 NZD