X
Gemstone Search

Your Details

Please fill in your email address

Please fill in a password

Forgot your password?

18.31 ct Green Cat's Eye Opal Gemstone, Cat's Eye Opal Gem in Square Cabochon Shape for Sale.
Photos are of Actual Product for Sale
18.31 ct Green Cat's Eye Opal Stone, Natural Cat's Eye Opal in Square Cabochon Shape for Sale Cat's Eye Opal Gemstone in 18 x 18 mm (calibrated) Size for Sale, Cat's Eye Opal Stone in Medium Green Color

18.31ct Natural Medium Green Cat's Eye Opal, Square, Opaque

9.2 out of 10
See Bizrate Ratings for GemSelect
Cat's Eye Opal Product ID: 669528
Type: Cat's Eye Opal
Cat's Eye Opal Weight: 18.31 ct Cat's Eye Opal 1 gem
Cat's Eye Opal Size: 18 x 18 mm calibrated Cat's Eye Opal
Cat's Eye Opal Size: 17.8 x 17.8 mm Cat's Eye Opal
Cat's Eye Opal Exact Size: 17.83 x 17.83 x 6.80 mm
Length x Width x Depth
Cat's Eye Opal Shape: Square Cabochon Cat's Eye Opal
Cat's Eye Opal Color: Medium Green Cat's Eye Opal
Cat's Eye Opal Clarity: Opaque Cat's Eye Opal
Cat's Eye Opal Treatment: Untreated
Cat's Eye Opal Origin: Brazil Cat's Eye Opal
Content: 1 pc
Certificate Options

Checking all Boxes

  • Natural certified gemstones

    Gemstone Laboratories
  • Accept Credit, Debit Card and PayPal

    Payment Options
  • Worldwide shipping

    Shipping Options
  • 30-day risk free return policy

$
54.94
Item in Stock
Certified Gemstones

RISK FREE

30 DAY RETURN MONEY BACK GUARANTEE

100%

FULLY GUARANTEED

Product Description

This is a 18.31 carat natural medium green Cat's Eye Opal gem, 1 pc in square shape with an exact size of 17.97 x 17.69 x 6.80 mm. This loose Cat's Eye Opal gemstone was mined in Brazil and its clarity is Opaque. No treatment has been applied on this natural Cat's Eye Opal stone

GemSelect Policies

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

It was very good and concise.

Posted By Whydothey in August, 2024
Source: Bizrate

Overall Rating -> 10 star ratings

I've made several purchases through GemSelect in the past, although not within the last six months. Their gems are always beautiful and I have never had an issue with their prices or their stones. Even when I'm not buying, I love scrolling through their website, which is very user friendly. I especially appreciate being able to change the listing order to your own liking, such as most to least expensive, largest to smallest, etc. As with most online orders, however, I think the shipping charges are not commensurate with the actual weight of the items shipped.

Posted By DrLHS in November, 2024
Source: Bizrate

Overall Rating -> 10 star ratings

I love the product and the details about each of them.

Posted By Love It! in July, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

Loved the lot buy options

Posted By BDG in October, 2024
Source: Bizrate

Overall Rating -> 10 star ratings

Nice website I just don't know much about the quality until I receive the stone.

Posted By Becky in December, 2024
Source: Bizrate

Overall Rating -> 9 star ratings

I did not realize these stones were of jewelry quality. They are really beautiful, just not what I was expecting which was more of a natural stone.

Posted By Jewelry Quality Stones in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great for buying gemstones, came with authenticity certs. Will buy again someday!

Posted By Uggadugga in May, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very professional site

Posted By JR in January, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

It's mostly good, only some item's are easier to find through the search than the menu

Posted By Wayne in July, 2025
Source: Bizrate
Download Identification Report PDF
BGL Brief Report $ 18.00
Turnaround Time: 3-4 working days Details
AIG Brief Report $ 35.00
Turnaround Time: 5-10 working days Details
ICA Brief Report $ 62.00
Turnaround Time: 8-12 working days Details
Enlarged Gemstone Image