CaratHunter
Plans
Heart|Natural|GIA

0.51ct I SI1 Heart Natural Diamond

GD • I/SI1 • GIA 6525507774

Certificate GIA 6525507774

Diamond specifications and retailer prices

From $537 AUD
As of November 6, 2026
Save $152 AUD (22%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $689 AUD at 77 Diamonds · As of November 6, 2026
View at 77 Diamonds

About this 0.51ct natural heart diamond

This 0.51ct natural heart sits in the half to three-quarter carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 6525507774. Listed at 3 retailers as of November 6, 2026, with prices from $537 to $689, a $152 spread on the same certified stone. 77 Diamonds lists it at $689. 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

0.51
Carat
I
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6525507774
Dimensions4.97 × 5.52 × 3.28 mm
L/W Ratio1.11
Top View
4.97 mm5.52 mm0.51 ctI / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6525507774
Side View
Table 57.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 59.4%

Caratlytics Score

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

Price History

Last verified: Nov 6
Current: $689 AUD|Low: $506 AUD|High: $773 AUD|Avg: $608 AUD|-9.1%
77 Diamonds
Retailer 2
Retailer 3
November 6, 2026
Retailer 2$537 AUD
Retailer 3$560 AUD
77 Diamonds$689 AUD

42 data points across 3 retailers

3 retailers$537 AUD to $689 AUD

A
Cheapest Retailer
-
$537 AUD
A
Retailer 2
-
$560 AUD
View
Final sale: no returns
Most Expensive
B+
77 Diamonds
HSCPAKMJSUMR · Nov 6
$689 AUD
£373 GBP
View
2 more retailers have this diamond
Prices start from $537 AUDSave up to $152 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
0.51ct Heart
$537 AUD