Skip to content

Search

Home
Shop
Fair Trade Gems
About Us
Wholesale
Log In/Create Account

Only a small portion of our inventory is currently online

Will tariffs impact my order? Read our latest update.

Sign up for wholesale access

Home
Shop
Fair Trade Gems
About Us
Wholesale

Gemstones

3 products

Sort by

Featured
Best selling
Alphabetically, A-Z
Alphabetically, Z-A
Price, low to high
Price, high to low
Date, old to new
Date, new to old

Cushion
10.0+ carats
Clear all

Gem Variety

Amethyst (0)
Aquamarine (0)
Citrine (0)
Diopside (1)
Garnet (0)
Opal (0)
Quartz (0)
Sphene (0)
Topaz (1)
Tourmaline (1)
Zircon (0)

Variety Specifics

Blue Zircon (0)
Fire Citrine® (0)
Green Quartz (0)
Imperial Diopside® (0)
Iris Amethyst® (0)
Madeira Citrine (0)
Mexican Fire Opal (0)
Oro Verde Quartz (0)
Raja Garnet® (0)
Rutilated Quartz (0)
Seafoam Tourmaline® (0)
Sky Blue Topaz (0)
Swiss Blue Topaz (1)
Tashmarine (1)
White Topaz (0)
Yellow Citrine (0)

Shape

Bowtie (0)
Cushion (3)
Emerald Cut (0)
Hexagon (7)
Octagon (0)
Oval (4)
Pear (1)
Round (2)
Snowflake (0)
Triangle (0)
Trillion (1)

Shape Specifics

Checkerboard Top (0)
Concave Cut (3)
Elongated (0)
Fancy Cut (3)
Fantasy (0)

Fair Trade Level

2 (0)
3 (2)
4 (1)

Origin

Afghanistan (1)
Africa (0)
Brazil (0)
Cambodia (0)
China (1)
India (0)
Mexico (0)
Nigeria (0)
Pakistan (0)
Russia (0)
Uruguay (0)
USA (0)

Location

Arkansas (0)
Odisha (0)
Xinjiang (1)
Yakutsk (0)

Color

Bi-Color(0)
Blue(1)
Brown(0)
Colorless(0)
Golden(0)
Green(1)
Madeira(0)
Multi(0)
Orange(0)
Pink(1)
Purple(0)
Red(0)
White(0)
Yellow(0)

Treatment

Not Treated (2)
Treated (1)

Gem Cut

Faceted (3)

Stone Size

6-8mm (0)
8-10mm (0)
10-12mm (0)
12-15mm (0)
15-20mm (3)
>20mm (0)
Free Size (0)

Total Gem Weight

1.50 to 2.0 carats (1)
2.0 to 3.0 carats (2)
3.0 to 5.0 carats (7)
5.0 to 10.0 carats (1)
10.0+ carats (3)

14.93ct Natural Radial Cushion Cut Tashmarine

14.93ct Tashmarine Concave Cushion

Regular Price: $7,465.00

Sale Price: $7,465.00
Regular Price

Unit Price: per

Added to Cart View Cart or Continue Shopping.

Cart Error Some items became unavailable. Update the quantity and try again.

29.56ct Concave Radian Custion Pink Tourmaline

29.56ct Pink Tourmaline Concave Cushion

Regular Price: $77,595.00

Sale Price: $77,595.00
Regular Price

Unit Price: per

Added to Cart View Cart or Continue Shopping.

Cart Error Some items became unavailable. Update the quantity and try again.

14.28ct Swiss Blue Topaz Concave Cushion

Regular Price: $857.00

Sale Price: $857.00
Regular Price

Unit Price: per

Added to Cart View Cart or Continue Shopping.

Cart Error Some items became unavailable. Update the quantity and try again.

Showing items 1-3 of 3.

1-800-888-2444

Company

About Us
Blog
Contact

Customer Care

Shipping
Returns
Wholesale Accounts
Terms & Conditions
Privacy

Connect

Stay in the know!

Enter Email Address

Copyright © 2025 Columbia Gem House.

Currency

Currency

Search

Join our mailing list

For updates on products and new releases

Enter Email Address

*By completing this form you're signing up to receive our emails and can unsubscribe at any time.