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Round|Natural|GIA

1.55ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 1553168978

Certificate GIA 1553168978

Diamond specifications and retailer prices

From $8,625 AUD
As of November 6, 2026
Save $5,184 AUD (38%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $15,256 AUD at MOH London · As of October 21, 2026
View at MOH London

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 1553168978. Listed at 22 retailers as of November 5, 2026, with a 60% 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 angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 1553168978
Dimensions7.56 × 7.60 × 4.51 mm
L/W Ratio1.01
Girdle conditionThin to Medium
Culet sizeNone
Top View
7.56 mm7.60 mm1.55 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1553168978
Side View
Table 62.0%Crown 33.5°Girdle: THN-MEDPavilion 41.6°Culet: NoneDepth 59.4%

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 6
Current: $15,256 AUD|Low: $8,294 AUD|High: $15,358 AUD|Avg: $10,998 AUD|-0.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
November 6, 2026
Retailer 8$8,300 AUD
Retailer 14$8,625 AUD
Retailer 13$8,773 AUD
Retailer 9$9,023 AUD
Retailer 2$9,285 AUD
Retailer 3$9,496 AUD
Retailer 10$10,051 AUD
Retailer 20$10,295 AUD
Retailer 11$10,605 AUD
Retailer 18$10,764 AUD
Retailer 12$10,888 AUD
Retailer 6$11,163 AUD
Retailer 16$11,163 AUD
Retailer 19$11,527 AUD
Retailer 5$11,636 AUD
Retailer 17$12,237 AUD
Retailer 15$12,348 AUD
Retailer 7$12,611 AUD
Retailer 4$13,809 AUD
MOH London$15,256 AUD

26 data points across 20 retailers

22 retailers$8,625 AUD to $13,809 AUD

Retailer 1
-
$8,011 AUD
Price last confirmed 17 days ago
B+
Retailer 2
-
$8,625 AUD
View
B+
Retailer 3
-
$8,773 AUD
View
Retailer 4
-
$8,901 AUD
View
Price last confirmed 36 days ago
Retailer 5
-
$9,023 AUD
View
Price last confirmed 19 days ago
B+
Retailer 6
-
$9,285 AUD
View
Final sale: no returns
B+
Retailer 7
-
$9,496 AUD
View
Retailer 8
-
$10,051 AUD
View
Price last confirmed 25 days ago
B+
Retailer 9
-
$10,295 AUD
View
Retailer 10
-
$10,605 AUD
View
Price last confirmed 33 days ago
B+
Retailer 11
-
$10,764 AUD
View
Retailer 12
-
$10,888 AUD
View
Price last confirmed 29 days ago
Retailer 13
-
$11,055 AUD
View
Price last confirmed 38 days ago
B
Retailer 14
-
$11,163 AUD
View
B
Retailer 15
-
$11,163 AUD
View
B+
Retailer 16
-
$11,527 AUD
View
B+
Retailer 17
-
$11,636 AUD
View
B
Retailer 18
-
$12,237 AUD
View
B
Retailer 19
-
$12,348 AUD
View
Retailer 20
-
$12,563 AUD
View
Price last confirmed 38 days ago
B
Retailer 21
-
$13,809 AUD
View
Most Expensive
MOH London
ADCE41C9E · Oct 21
$15,256 AUD
£8,254 GBP
View
Price last confirmed 16 days ago
21 more retailers have this diamond
Prices start from $8,625 AUDSave up to $5,184 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
$8,625 AUD