X
Gemstone Search
90,000+ Happy Customers
20+ Years In Business
Call Us Mon–Fri 8am–5pm

Your Details

Please fill in your email address

Please fill in a password

Forgot your password?

Calibrated Marquise Cut Gemstones in Size 12x6 mm

Marquise Shape 12x6 mm Gems Weight
Marquise Shape 12x6 mm Gems Size
Marquise Shape 12x6 mm Gems Clarity
Marquise Shape 12x6 mm Gems Price
Marquise Shape 12x6 mm Gems Treatment

Size Explained

Choose Size or Size Range
For Example: 6-7
For Example: 8-9
Bi-color
Black
Blue Marquise Shape 12x6 mm Gems
Brown Marquise Shape 12x6 mm Gems
Golden
Gray
Green
Multicolor Marquise Shape 12x6 mm Gems
Orange
Pink
Purple
Red Marquise Shape 12x6 mm Gems
Turquoise
Violet Marquise Shape 12x6 mm Gems
White Marquise Shape 12x6 mm Gems
Yellow Marquise Shape 12x6 mm Gems
Single
Pairs
Lots
Faceted
Cabochons
Clear All

3.96ctw Red Pyrope Garnet, Marquise, VVS-VS

11.9 x 5.9 mm

$ 43.52

View Gem

3.81ctw Red Pyrope Garnet, Marquise, VVS

12.1 x 6 mm

$ 33.40

View Gem

5.23ctw Red Pyrope Garnet, Marquise, VVS-VS

12 x 6 mm

$ 51.74

View Gem

1.30ct Violet Amethyst, Marquise, VS

12 x 5.9 mm

$ 9.97

View Gem

4.97ctw Multicolor Labradorite, Marquise, Translucent

12 x 6 mm (calibrated)

$ 10.99

View Gem

7.00ctw Red Pyrope Garnet, Marquise, VVS-VS

11.7 x 5.9 mm

$ 61.35

View Gem

3.08ctw Red Pyrope Garnet, Marquise, VVS-VS

12 x 6 mm

$ 26.99

View Gem

2.46ct Multicolor Labradorite, Marquise, Translucent

12 x 6 mm (calibrated)

$ 5.44

View Gem

4.00ctw Red Pyrope Garnet, Marquise, VVS-VS

12.1 x 6 mm

$ 35.06

View Gem

1.90ct Red Pyrope Garnet, Marquise, VVS-VS

12 x 5.9 mm

$ 20.88

View Gem

3.61ctw Red Pyrope Garnet, Marquise, VVS-VS

12 x 6.1 mm

$ 31.64

View Gem

3.35ctw Red Pyrope Garnet, Marquise, VVS-VS

12.1 x 6 mm

$ 18.36

View Gem

1.81ct Red Almandine Garnet, Marquise, VVS

12 x 6 mm (calibrated)

$ 67.60

View Gem

4.72ctw Blue Topaz, Marquise, VVS-VS

12 x 6.1 mm

$ 25.85

View Gem

4.55ctw Red Pyrope Garnet, Marquise, VVS-VS

12 x 6.1 mm

$ 39.88

View Gem

2.71ct Multicolor Labradorite, Marquise, Translucent

12 x 6 mm (calibrated)

$ 5.99

View Gem

4.96ctw Multicolor Labradorite, Marquise, Translucent

12 x 6 mm (calibrated)

$ 10.96

View Gem

2.34ct Blue Topaz, Marquise, VVS-VS

12 x 6.1 mm

$ 12.82

View Gem

2.51ct Multicolor Labradorite, Marquise, Translucent

12 x 6 mm (calibrated)

$ 5.54

View Gem

3.60ctw Red Pyrope Garnet, Marquise, VVS-VS

12.1 x 6 mm

$ 63.10

View Gem

1.54ct Violet Amethyst, Marquise, VS

12 x 6.1 mm

$ 11.81

View Gem

2.05ct Violet Amethyst, Marquise, VVS-VS

12 x 6.1 mm

$ 13.48

View Gem

1.86ct Violet Amethyst, Marquise, VS

11.6 x 5.9 mm

$ 12.23

View Gem

3.92ctw Red Pyrope Garnet, Marquise, VVS-VS

12 x 6.2 mm

$ 38.79

View Gem

Why Buy Marquise Shape 12x6 Mm Gems from GemSelect?

GemSelect Certified Store Reviews

GemSelect: Over 22 Years in the Gemstone Business! Thank you for trusting us with your purchase!

Overall Rating -> 10 star ratings

this site is awesome. I was able to look at the products think about purchasing and come back and find the same products. With the amount of inventory gem select has. Its awesome to be able to filter the way that they allow you too.

Posted By Tommyp in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Love beauty, color, quality, and price of these gems. Personal projects and will come here soon and everytime.

Posted By Darkstar in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

GemSelect offers excellent choices, prices & service- highly recommended! Unfortunately, prior to ordering a replacement gemstone, my jeweler neglected to mention it needed to be one that was a'cushion cuta' to fit the existing mount. Have yet to return/exchangea'

Posted By CJ in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

My current project is something BLUE . Opal earrings with matching tennis bracelet for her wedding. The opals and sixty two sapphires VVS & VS are AMAZINGLY BEAUTIFUL. The private jewelers were impressed by the clarity and inclusion free of the sapphires . I want to say thank you for the High quality sapphires that I purchased for my daughtera's wedding.

Posted By My real name Dean or Wandering about in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very large selection from affordable to high end I will be coming back to shop again!

Posted By GreenGator in August, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Fast snd easy to find what I was looking for

Posted By Bawb in May, 2026
Source: Bizrate
Enlarged Gemstone Image