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Marquise|Natural|GIA

1.21ct I SI1 Marquise Natural Diamond

GD • I/SI1 • GIA 1558196256

Certificate GIA 1558196256

Diamond specifications and retailer prices

From $7,488 AUD
As of November 5, 2026
Save $1,889 AUD (20%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $9,377 AUD at 77 Diamonds · As of November 7, 2026
View at 77 Diamonds

About this 1.21ct natural marquise diamond

This 1.21ct natural marquise sits in the classic one-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 1558196256. Listed at 3 retailers as of November 5, 2026, with prices from $7,488 to $9,377, a $1,889 spread on the same certified stone. 77 Diamonds lists it at $9,377. 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

1.21
Carat
I
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41.51°
Pavilion angle41.34°
OriginNatural
Grading LabGIA
CertificateGIA 1558196256
Dimensions9.88 × 5.41 × 3.63 mm
L/W Ratio1.83
Culet sizeNone
Top View
9.88 mm5.41 mm1.21 ctI / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1558196256
Side View
Table 64.0%Crown 41.51°Girdle: STK-VTKPavilion 41.34°Culet: NoneDepth 67.0%

Caratlytics Score

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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: Nov 5
Current: $9,377 AUD|Low: $4,020 AUD|High: $9,700 AUD|Avg: $6,976 AUD|+1.1%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 7, 2026
Retailer 3$4,020 AUD
Retailer 10$5,480 AUD
Retailer 7$5,717 AUD
Retailer 12$5,891 AUD
Retailer 5$6,443 AUD
Retailer 8$6,819 AUD
Retailer 13$6,826 AUD
Retailer 11$6,881 AUD
Retailer 6$7,488 AUD
Retailer 2$8,706 AUD
Retailer 9$8,920 AUD
77 Diamonds$9,377 AUD
Retailer 4$9,700 AUD

36 data points across 13 retailers

3 retailers$7,488 AUD to $9,377 AUD

B
Cheapest Retailer
-
$7,488 AUD
C
Retailer 2
-
$8,706 AUD
View
Most Expensive
C
77 Diamonds
MQMBY8VBCHFH · Nov 7
$9,377 AUD
£5,073 GBP
View
2 more retailers have this diamond
Prices start from $7,488 AUDSave up to $1,889 AUD

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
1.21ct Marquise
$7,488 AUD