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Heart|Natural|GIA

0.90ct K SI1 Heart Natural Diamond

EX • K/SI1 • GIA 6227787766

Certificate GIA 6227787766

Diamond specifications and retailer prices

From $971 AUD
As of November 5, 2026
Save $635 AUD (40%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $1,606 AUD at 77 Diamonds · As of November 5, 2026
View at 77 Diamonds

About this 0.9ct natural heart diamond

This 0.9ct natural heart sits in the just-under-one-carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6227787766. Listed at 5 retailers as of November 5, 2026, with prices from $971 to $1,606, a $635 spread on the same certified stone. 77 Diamonds lists it at $1,606. 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

0.90
Carat
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6227787766
Dimensions6.06 × 6.52 × 3.87 mm
L/W Ratio1.08
Girdle conditionFaceted
Cert comments
Pinpoints are not shown. Surface graining is not shown.
Key to symbols
Crystal
Top View
6.06 mm6.52 mm0.90 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryGood
FluorescenceNone
CertificateGIA 6227787766
Side View
Table 54.0%CrownGirdle: THK-ETKPavilionCulet: NoneDepth 59.3%

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: $1,606 AUD|Low: $971 AUD|High: $1,625 AUD|Avg: $1,241 AUD|+1.3%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 6, 2026
Retailer 4$971 AUD
Retailer 5$974 AUD
Retailer 3$1,140 AUD
Retailer 2$1,514 AUD
77 Diamonds$1,606 AUD

42 data points across 5 retailers

5 retailers$971 AUD to $1,606 AUD

A
Cheapest Retailer
-
$971 AUD
A
Retailer 2
-
$974 AUD
View
B+
Retailer 3
-
$1,140 AUD
View
B+
Retailer 4
-
$1,514 AUD
View
Most Expensive
B+
77 Diamonds
HSMB5WHPCK2D · Nov 5
$1,606 AUD
£869 GBP
View
4 more retailers have this diamond
Prices start from $971 AUDSave up to $635 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
0.90ct Heart
$971 AUD