CaratHunter
Plans
Round|Natural|GIA

1.51ct H SI2 Round Natural Diamond

EX • H/SI2 • GIA 2125868320

Certificate GIA 2125868320

Diamond specifications and retailer prices

From $8,695 USD
As of October 25, 2026
Save $8,413 USD (49%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $17,108 USD at Diamond Quarter · As of October 29, 2026
View at Diamond Quarter

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2125868320. Listed at 19 retailers as of October 25, 2026, with prices from $8,695 to $17,108, a $8,413 spread on the same certified stone. Diamond Quarter lists it at $17,108. 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

1.51
Carat
H
Color
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2125868320
Dimensions7.37 × 7.35 × 4.56 mm
L/W Ratio1.00
Culet sizeNone
Top View
7.37 mm7.35 mm1.51 ctH / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 2125868320
Side View
Table 57.0%CrownGirdle: MediumPavilionCulet: NoneDepth 62.0%

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: Oct 25
Current: $10,622 USD|Low: $8,141 USD|High: $15,442 USD|Avg: $11,382 USD|-0.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 30, 2026
Retailer 4$8,695 USD
Retailer 5$9,769 USD
Retailer 6$10,584 USD
Retailer 1$10,622 USD
Retailer 2$11,784 USD
Retailer 7$12,856 USD
Retailer 3$15,339 USD

39 data points across 7 retailers

19 retailers$8,695 USD to $17,108 USD

B
Cheapest Retailer
-
$8,695 USD
B
Retailer 2
-
$8,887 USD
View
B
Retailer 3
-
$9,064 USD
View
B
Retailer 4
-
$9,403 USD
CA$13,059 CAD
View
B
Retailer 5
-
$9,769 USD
View
B
Retailer 6
-
$9,769 USD
View
Final sale: no returns
B
Retailer 7
-
$10,584 USD
View
B
Retailer 8
-
$10,622 USD
£8,364 GBP
View
B
Retailer 9
-
$10,746 USD
View
B
Retailer 10
-
$11,272 USD
View
B
Retailer 11
-
$11,460 USD
View
B
Retailer 12
-
$11,460 USD
View
B
Retailer 13
-
$11,784 USD
€11,223 EUR
View
B
Retailer 14
-
$11,850 USD
View
B
Retailer 15
-
$12,212 USD
View
Retailer 16
-
$12,856 USD
View
Price last confirmed 8 days ago
B
Retailer 17
-
$15,339 USD
£12,078 GBP
View
B
Retailer 18
-
$16,282 USD
View
Most Expensive
B
Diamond Quarter
1.51SI2H2120A7B6N · Oct 29
$17,108 USD
£13,471 GBP
View
18 more retailers have this diamond
Prices start from $8,695 USDSave up to $8,413 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
1.51ct Round
$8,695 USD