Cushion|Natural|GIA

1.51ct I SI1 Cushion Natural Diamond

VG • I/SI1 • GIA 1235579975

Certificate GIA 1235579975

Diamond specifications and retailer prices

From $6,640 USD
As of October 31, 2026
Save $5,830 USD (47%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $12,470 USD at MOH London · As of November 1, 2026
View at MOH London

About this 1.51ct natural cushion diamond

This 1.51ct natural cushion sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 1235579975. Listed at 21 retailers as of October 31, 2026, with prices from $6,640 to $12,470, a $5,830 spread on the same certified stone. MOH London lists it at $12,470. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
I
Color
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1235579975
Dimensions6.68 × 6.64 × 4.43 mm
L/W Ratio1.01
Top View
6.68 mm6.64 mm1.51 ctI / SI1
OriginNatural
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 1235579975
Side View
Table 70.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 66.7%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Oct 31
Current: $12,470 USD|Low: $6,236 USD|High: $12,620 USD|Avg: $8,732 USD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 9$6,640 USD
Retailer 7$6,680 USD
Retailer 5$7,483 USD
Retailer 8$7,483 USD
Retailer 2$8,343 USD
Retailer 6$8,485 USD
Retailer 4$9,240 USD
Retailer 3$10,993 USD
MOH London$12,470 USD

44 data points across 9 retailers

21 retailers$6,640 USD to $12,470 USD

B
Cheapest Retailer
-
$6,640 USD
Retailer 2
-
$6,680 USD
View
Price last confirmed 14 days ago
B
Retailer 3
-
$6,950 USD
View
B
Retailer 4
-
$7,006 USD
View
B
Retailer 5
-
$7,192 USD
View
B
Retailer 6
-
$7,399 USD
CA$10,276 CAD
View
B
Retailer 7
-
$7,465 USD
View
B
Retailer 8
-
$7,483 USD
View
Final sale: no returns
B
Retailer 9
-
$7,483 USD
View
B
Retailer 10
-
$7,614 USD
View
B
Retailer 11
-
$8,343 USD
£6,569 GBP
View
B
Retailer 12
-
$8,365 USD
View
Retailer 13
-
$8,485 USD
A$13,054 AUD
View
Price last confirmed 9 days ago
B
Retailer 14
-
$8,583 USD
View
B
Retailer 15
-
$8,910 USD
View
B
Retailer 16
-
$8,910 USD
View
B
Retailer 17
-
$9,210 USD
View
B
Retailer 18
-
$9,240 USD
€8,800 EUR
View
Retailer 19
-
$9,853 USD
View
Price last confirmed 10 days ago
B
Retailer 20
-
$10,993 USD
ZAR 177,588 ZAR
View
Most Expensive
B
MOH London
B8380E7D5 · Nov 1
$12,470 USD
£9,819 GBP
View
20 more retailers have this diamond
Prices start from $6,640 USDSave up to $5,830 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 Cushion
$6,640 USD