Round|Natural|GIA

1.51ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 1155978214

Certificate GIA 1155978214

Diamond specifications and retailer prices

From $15,473 CAD
$11,055 USD
As of October 25, 2026
Save $14,324 CAD (48%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $29,797 CAD at Diamond Quarter · As of October 28, 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 E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1155978214. Listed at 18 retailers as of October 25, 2026, with prices from $15,473 to $29,797, a $14,324 spread on the same certified stone. Diamond Quarter lists it at $29,797. 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
E
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 1155978214
Dimensions7.38 × 7.36 × 4.47 mm
L/W Ratio1.00
Culet sizeNone
Top View
7.38 mm7.36 mm1.51 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 1155978214
Side View
Table 60.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 60.6%

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: Oct 25
Current: $18,610 CAD|Low: $14,640 CAD|High: $27,766 CAD|Avg: $20,753 CAD|-0.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 29, 2026
Retailer 6$15,473 CAD
Retailer 7$16,836 CAD
Retailer 1$18,610 CAD
Retailer 5$18,856 CAD
Retailer 3$21,109 CAD
Retailer 4$25,671 CAD
Retailer 2$27,583 CAD

44 data points across 7 retailers

18 retailers$15,473 CAD to $29,797 CAD

B+
Cheapest Retailer
-
$15,473 CAD
$11,055 USD
B+
Retailer 2
-
$16,038 CAD
$11,459 USD
View
B+
Retailer 3
-
$16,300 CAD
$11,646 USD
View
B+
Retailer 4
-
$16,413 CAD
View
B
Retailer 5
-
$16,836 CAD
$12,029 USD
View
Final sale: no returns
B
Retailer 6
-
$17,285 CAD
$12,350 USD
View
B
Retailer 7
-
$17,568 CAD
$12,552 USD
View
B
Retailer 8
-
$18,610 CAD
£10,470 GBP
View
B
Retailer 9
-
$18,738 CAD
$13,388 USD
View
B
Retailer 10
-
$18,856 CAD
A$20,727 AUD
View
B
Retailer 11
-
$19,030 CAD
$13,597 USD
View
B
Retailer 12
-
$19,762 CAD
$14,120 USD
View
B
Retailer 13
-
$20,354 CAD
$14,543 USD
View
B
Retailer 14
-
$21,109 CAD
€14,364 EUR
View
B
Retailer 15
-
$25,671 CAD
ZAR 296,315 ZAR
View
B
Retailer 16
-
$27,583 CAD
£15,518 GBP
View
B
Retailer 17
-
$29,278 CAD
$20,919 USD
View
Most Expensive
B
Diamond Quarter
1.51SI1E1114893CN · Oct 28
$29,797 CAD
£16,763 GBP
View
17 more retailers have this diamond
Prices start from $15,473 CADSave up to $14,324 CAD

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
$15,473 CAD