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1.51ct G FL Round Natural Diamond

EX • G/FL • GIA 2506220512

Certificate GIA 2506220512

Diamond specifications and retailer prices

From $18,445 AUD
As of November 5, 2026
Save $20,156 AUD (52%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $38,601 AUD at Diamond Quarter · As of November 5, 2026
View at Diamond Quarter

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by GIA 2506220512. Listed at 3 retailers as of November 5, 2026, with prices from $18,445 to $38,601, a $20,156 spread on the same certified stone. Diamond Quarter lists it at $38,601. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.51
Carat
G
Colour
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 2506220512
Dimensions7.35 × 7.30 × 4.49 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Culet sizeNone
Top View
7.35 mm7.30 mm1.51 ctG / FL
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2506220512
Side View
Table 60.0%Crown 34.5°Girdle: Slightly ThickPavilion 40.8°Culet: NoneDepth 61.3%

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 5
Current: $18,445 AUD|Low: $16,179 AUD|High: $25,812 AUD|Avg: $20,640 AUD|+1.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 5, 2026
Retailer 9$16,453 AUD
Retailer 5$16,855 AUD
Retailer 1$18,445 AUD
Retailer 6$18,606 AUD
Retailer 10$19,418 AUD
Retailer 13$19,795 AUD
Retailer 8$20,713 AUD
Retailer 11$21,443 AUD
Retailer 3$21,705 AUD
Retailer 4$21,832 AUD
Retailer 7$22,566 AUD
Retailer 12$25,670 AUD
Retailer 2$25,812 AUD

8 data points across 13 retailers

3 retailers$18,445 AUD to $38,601 AUD

A
Cheapest Retailer
-
$18,445 AUD
A
Retailer 2
-
$18,606 AUD
View
Final sale: no returns
Most Expensive
B
Diamond Quarter
1.51FLG251280B3N · Nov 5
$38,601 AUD
£21,277 GBP
View
2 more retailers have this diamond
Prices start from $18,445 AUDSave up to $20,156 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.

A
1.51ct Round
$18,445 AUD