Round|Natural|GIA

1.55ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 6321773138

Certificate GIA 6321773138

Diamond specifications and retailer prices

From $9,481 USD
As of November 1, 2026
Save $6,478 USD (41%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $17,031 USD 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 18 retailers as of November 1, 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
Color
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

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B
Good
Decent quality, room for better deals
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $15,959 USD|Low: $9,481 USD|High: $16,151 USD|Avg: $12,495 USD|-0.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 9$9,481 USD
Retailer 10$10,218 USD
Retailer 5$10,959 USD
Retailer 7$11,255 USD
Retailer 8$11,716 USD
Retailer 4$12,818 USD
Retailer 2$13,444 USD
Retailer 3$13,541 USD
Retailer 6$15,012 USD
Retailer 1$15,959 USD

32 data points across 10 retailers

18 retailers$9,481 USD to $15,959 USD

B
Cheapest Retailer
-
$9,481 USD
B
Retailer 2
-
$10,900 USD
View
B
Retailer 3
-
$10,959 USD
£8,629 GBP
View
Retailer 4
-
$11,070 USD
View
Price last confirmed 45 days ago
Retailer 5
-
$11,255 USD
A$17,316 AUD
View
Price last confirmed 9 days ago
B
Retailer 6
-
$11,716 USD
View
Retailer 7
-
$11,716 USD
View
Price last confirmed 34 days ago
Retailer 8
-
$11,716 USD
View
Price last confirmed 18 days ago
B
Retailer 9
-
$11,750 USD
View
B
Retailer 10
-
$11,750 USD
View
B
Retailer 11
-
$12,140 USD
View
Retailer 12
-
$12,773 USD
View
Price last confirmed 43 days ago
B
Retailer 13
-
$12,818 USD
€12,208 EUR
View
Retailer 14
-
$13,444 USD
View
Price last confirmed 10 days ago
B
Retailer 15
-
$13,541 USD
£10,662 GBP
View
B
Retailer 16
-
$15,012 USD
ZAR 242,520 ZAR
View
B
Retailer 17
-
$15,959 USD
£12,566 GBP
View
Most Expensive
NZ Jewellers
610ff20b-4319-418f-b8be-e6336119932d · Sep 19
$17,031 USD
View
Price last confirmed 44 days ago
17 more retailers have this diamond
Prices start from $9,481 USDSave up to $6,478 USD

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
$9,481 USD