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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 $15,333 NZD
As of November 4, 2026
Save $12,734 NZD (45%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $38,206 NZD 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: $18,120 NZD|Low: $14,033 NZD|High: $26,615 NZD|Avg: $20,059 NZD|-0.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 5$15,333 NZD
Retailer 7$16,839 NZD
Retailer 1$18,120 NZD
Retailer 6$18,521 NZD
Retailer 8$18,524 NZD
Retailer 3$21,080 NZD
Retailer 2$24,567 NZD
Retailer 4$26,229 NZD

44 data points across 8 retailers

16 retailers$15,333 NZD to $28,067 NZD

B+
Cheapest Retailer
-
$15,333 NZD
B+
Retailer 2
-
$15,766 NZD
View
B
Retailer 3
-
$16,686 NZD
View
Retailer 4
-
$16,839 NZD
View
Price last confirmed 8 days ago
B
Retailer 5
-
$16,839 NZD
View
Final sale: no returns
B
Retailer 6
-
$18,120 NZD
View
B
Retailer 7
-
$18,243 NZD
View
Retailer 8
-
$18,521 NZD
View
Price last confirmed 14 days ago
B
Retailer 9
-
$18,524 NZD
View
B
Retailer 10
-
$21,050 NZD
View
B
Retailer 11
-
$21,080 NZD
View
Retailer 12
-
$22,163 NZD
View
Price last confirmed 14 days ago
B
Retailer 13
-
$24,567 NZD
View
B
Retailer 14
-
$26,229 NZD
View
B
Retailer 15
-
$28,067 NZD
View
Most Expensive
Diamond Quarter
1.55SI1H6436AC2BN · Nov 5
$38,206 NZD
£16,677 GBP
View
Price under review
15 more retailers have this diamond
Prices start from $15,333 NZDSave up to $12,734 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
$15,333 NZD