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Round|Natural|GIA

0.51ct H FL Round Natural Diamond

EX • H/FL • GIA 1509815203

Certificate GIA 1509815203

Diamond specifications and retailer prices

From $902 USD
As of November 2, 2026
Save $2,162 USD (71%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $3,064 USD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 0.51ct natural round diamond

This 0.51ct natural round sits in the half to three-quarter carat band, graded H colour (near-colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by GIA 1509815203. Listed at 8 retailers as of October 30, 2026, with prices from $902 to $3,064, a $2,162 spread on the same certified stone. NZ Jewellers lists it at $3,064. Flawless clarity in sub-one-carat stones is rarely visible to the naked eye over VS1, so you are paying a meaningful premium for grade rather than appearance.

The 4Cs

0.51
Carat
H
Color
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 1509815203
Dimensions5.16 × 5.20 × 3.14 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Top View
5.16 mm5.20 mm0.51 ctH / FL
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1509815203
Side View
Table 59.0%Crown 33°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 60.7%

Caratlytics Score

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

Price History

Last verified: Nov 2
Current: $3,064 USD|Low: $711 USD|High: $3,119 USD|Avg: $1,578 USD|-1.8%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 1, 2026
Retailer 4$902 USD
Retailer 5$1,156 USD
Retailer 3$1,275 USD
Retailer 6$1,284 USD
Retailer 7$1,328 USD
Retailer 2$1,789 USD
NZ Jewellers$3,064 USD

32 data points across 7 retailers

8 retailers$902 USD to $3,064 USD

A
Cheapest Retailer
-
$902 USD
Final sale: no returns
B+
Retailer 2
-
$1,156 USD
£910 GBP
View
B+
Retailer 3
-
$1,275 USD
€1,214 EUR
View
B+
Retailer 4
-
$1,284 USD
View
B+
Retailer 5
-
$1,328 USD
£1,046 GBP
View
B
Retailer 6
-
$1,789 USD
£1,409 GBP
View
B
Retailer 7
-
$1,928 USD
£1,518 GBP
View
Most Expensive
B
NZ Jewellers
ae09c55e-2bc0-4d57-9fab-3cbe3d830e9b · Oct 30
$3,064 USD
View
7 more retailers have this diamond
Prices start from $902 USDSave up to $2,162 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
0.51ct Round
$902 USD