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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 $10,690 NZD
As of November 6, 2026
Save $6,425 NZD (38%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $18,910 NZD 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: $18,910 NZD|Low: $10,280 NZD|High: $19,036 NZD|Avg: $13,632 NZD|-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$10,288 NZD
Retailer 14$10,690 NZD
Retailer 13$10,874 NZD
Retailer 9$11,184 NZD
Retailer 2$11,509 NZD
Retailer 3$11,770 NZD
Retailer 10$12,458 NZD
Retailer 20$12,761 NZD
Retailer 11$13,145 NZD
Retailer 18$13,342 NZD
Retailer 12$13,495 NZD
Retailer 6$13,836 NZD
Retailer 16$13,836 NZD
Retailer 19$14,287 NZD
Retailer 5$14,422 NZD
Retailer 17$15,167 NZD
Retailer 15$15,304 NZD
Retailer 7$15,631 NZD
Retailer 4$17,115 NZD
MOH London$18,910 NZD

26 data points across 20 retailers

22 retailers$10,690 NZD to $17,115 NZD

Retailer 1
-
$9,929 NZD
Price last confirmed 17 days ago
B+
Retailer 2
-
$10,690 NZD
View
B+
Retailer 3
-
$10,874 NZD
View
Retailer 4
-
$11,033 NZD
View
Price last confirmed 36 days ago
Retailer 5
-
$11,184 NZD
View
Price last confirmed 19 days ago
B+
Retailer 6
-
$11,509 NZD
View
Final sale: no returns
B+
Retailer 7
-
$11,770 NZD
View
Retailer 8
-
$12,458 NZD
View
Price last confirmed 25 days ago
B+
Retailer 9
-
$12,761 NZD
View
Retailer 10
-
$13,145 NZD
View
Price last confirmed 33 days ago
B+
Retailer 11
-
$13,342 NZD
View
Retailer 12
-
$13,495 NZD
View
Price last confirmed 29 days ago
Retailer 13
-
$13,702 NZD
View
Price last confirmed 38 days ago
B
Retailer 14
-
$13,836 NZD
View
B
Retailer 15
-
$13,836 NZD
View
B+
Retailer 16
-
$14,287 NZD
View
B+
Retailer 17
-
$14,422 NZD
View
B
Retailer 18
-
$15,167 NZD
View
B
Retailer 19
-
$15,304 NZD
View
Retailer 20
-
$15,571 NZD
View
Price last confirmed 38 days ago
B
Retailer 21
-
$17,115 NZD
View
Most Expensive
MOH London
ADCE41C9E · Oct 21
$18,910 NZD
£8,254 GBP
View
Price last confirmed 16 days ago
21 more retailers have this diamond
Prices start from $10,690 NZDSave up to $6,425 NZD

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
$10,690 NZD