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Round|Natural|GIA

1.55ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 6485913336

Certificate GIA 6485913336

Diamond specifications and retailer prices

From $12,371 AUD
As of November 4, 2026
Save $10,274 AUD (45%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $30,825 AUD at Diamond Quarter · As of November 5, 2026
View at Diamond Quarter

About this 1.55ct natural round diamond

This 1.55ct natural round sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6485913336. Listed at 16 retailers as of November 4, 2026, with a 83% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.55
Carat
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 6485913336
Dimensions7.47 × 7.45 × 4.51 mm
L/W Ratio1.00
Star length50%
Lower girdle80%
Top View
7.47 mm7.45 mm1.55 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6485913336
Side View
Table 59.0%Crown 33.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 60.5%

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: Nov 4
Current: $14,619 AUD|Low: $11,322 AUD|High: $21,473 AUD|Avg: $16,184 AUD|-0.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 5$12,371 AUD
Retailer 7$13,586 AUD
Retailer 1$14,619 AUD
Retailer 6$14,943 AUD
Retailer 8$14,946 AUD
Retailer 3$17,008 AUD
Retailer 2$19,821 AUD
Retailer 4$21,162 AUD

44 data points across 8 retailers

16 retailers$12,371 AUD to $22,645 AUD

B+
Cheapest Retailer
-
$12,371 AUD
B+
Retailer 2
-
$12,720 AUD
View
B
Retailer 3
-
$13,462 AUD
View
Retailer 4
-
$13,586 AUD
View
Price last confirmed 8 days ago
B
Retailer 5
-
$13,586 AUD
View
Final sale: no returns
B
Retailer 6
-
$14,619 AUD
View
B
Retailer 7
-
$14,718 AUD
View
Retailer 8
-
$14,943 AUD
View
Price last confirmed 14 days ago
B
Retailer 9
-
$14,946 AUD
View
B
Retailer 10
-
$16,983 AUD
View
B
Retailer 11
-
$17,008 AUD
View
Retailer 12
-
$17,881 AUD
View
Price last confirmed 14 days ago
B
Retailer 13
-
$19,821 AUD
View
B
Retailer 14
-
$21,162 AUD
View
B
Retailer 15
-
$22,645 AUD
View
Most Expensive
Diamond Quarter
1.55SI1H6436AC2BN · Nov 5
$30,825 AUD
£16,677 GBP
View
Price under review
15 more retailers have this diamond
Prices start from $12,371 AUDSave up to $10,274 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.

B+
1.55ct Round
$12,371 AUD