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Round|Natural|GIA

1.55ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 6321773138

Certificate GIA 6321773138

Diamond specifications and retailer prices

From $13,799 AUD
As of November 4, 2026
Save $9,364 AUD (40%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $24,787 AUD at NZ Jewellers · As of September 19, 2026
View at NZ Jewellers

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 6321773138. Listed at 19 retailers as of November 4, 2026, with a 68% 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
OriginNatural
Grading LabGIA
CertificateGIA 6321773138
Dimensions7.36 × 7.40 × 4.62 mm
L/W Ratio1.01
Top View
7.36 mm7.40 mm1.55 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6321773138
Side View
Table 56.0%CrownGirdle: MediumPavilionCulet: NoneDepth 62.6%

Caratlytics Score

How it works →
B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $19,600 AUD|Low: $13,799 AUD|High: $23,505 AUD|Avg: $18,015 AUD|-1.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 8$13,799 AUD
Retailer 9$14,871 AUD
Retailer 3$15,793 AUD
Retailer 7$16,381 AUD
Retailer 6$17,051 AUD
Retailer 4$18,617 AUD
Retailer 1$19,600 AUD
Retailer 2$21,697 AUD
Retailer 5$23,163 AUD

34 data points across 9 retailers

19 retailers$13,799 AUD to $23,163 AUD

B
Cheapest Retailer
-
$13,799 AUD
B
Retailer 2
-
$15,793 AUD
View
B
Retailer 3
-
$15,862 AUD
View
Retailer 4
-
$16,111 AUD
View
Price last confirmed 50 days ago
Retailer 5
-
$16,381 AUD
View
Price last confirmed 14 days ago
B
Retailer 6
-
$17,051 AUD
View
Retailer 7
-
$17,051 AUD
View
Price last confirmed 7 days ago
Retailer 8
-
$17,051 AUD
View
Price last confirmed 39 days ago
Retailer 9
-
$17,051 AUD
View
Price last confirmed 23 days ago
B
Retailer 10
-
$17,101 AUD
View
B
Retailer 11
-
$17,101 AUD
View
B
Retailer 12
-
$17,669 AUD
View
Retailer 13
-
$18,590 AUD
View
Price last confirmed 48 days ago
B
Retailer 14
-
$18,617 AUD
View
Retailer 15
-
$19,566 AUD
View
Price last confirmed 14 days ago
B
Retailer 16
-
$19,600 AUD
View
B
Retailer 17
-
$21,697 AUD
View
B
Retailer 18
-
$23,163 AUD
View
Most Expensive
NZ Jewellers
610ff20b-4319-418f-b8be-e6336119932d · Sep 19
$24,787 AUD
$17,031 USD
View
Price last confirmed 48 days ago
18 more retailers have this diamond
Prices start from $13,799 AUDSave up to $9,364 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
$13,799 AUD