16 - 18 mm Opal Gemstones

16 - 18 mm Opal Gems

Gemstone Information

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Overall Rating -> 10

Great site easy to find what I'm looking for

Posted By Gero in December, 2022

Source: Bizrate

Overall Rating -> 9

Not easy enough to buy by exact size, and many stones aren't carbechon curved shape on top

Posted By Erick in July, 2023

Source: Bizrate

Overall Rating -> 10

Love all the filters. Easy to find the size I needed.

Posted By Melinda in December, 2022

Source: Bizrate

Overall Rating -> 7

I love this site, I learn a lot from it. I like the selection and quality, I can't wait to use them in my work. The specimens are phenomenal. Look forward to more business from me in the future..

Posted By Ophii in January, 2023

Source: Bizrate

Overall Rating -> 10

Overall, the whole process was just great.

Posted By Thatoneguy in August, 2023

Source: Bizrate

Overall Rating -> 10

very good

Posted By Dave in February, 2023

Source: Bizrate

Overall Rating -> 10

Fantastic dealer for quality gemstones. Website is easy to navigate, selection is superb, delivery of purchases is prompt. Easy to select incorrect payment options, however.

Posted By David W in May, 2023

Source: Bizrate

Overall Rating -> 8

1st time buy. The experience to date has been easy.

Posted By Q in December, 2022

Source: Bizrate

Overall Rating -> 10

easy , fast , dependable

Posted By Jennifer in January, 2023

Source: Bizrate

Overall Rating -> 10

I am excited for my first order, search tools were a great help to find the sapphire I needed for my next project! Thank you

Posted By Sue in April, 2023

Source: Bizrate

Overall Rating -> 10

Gems look fantastic and just as advertised.

Posted By Jess in October, 2022

Source: Bizrate

Overall Rating -> 10

My last experience was good, in fact every experience I have had with them has met my expectations or surpassed them. These are really good people to work with.

Posted By Spinach in May, 2023

Source: Bizrate

Overall Rating -> 10

Everthing about researching and ordering from Gemselect was easy and uncomplicated. In the past I had payment problems, but your customer rep, Thomas, helped me get everything right. I will continue using Gemselet in the future for these reasons.

Posted By WildwillyfromArizona in August, 2023

Source: Bizrate

Overall Rating -> 10

The product was held up in Anchorage Alaska due to customs. It was also delayed in the U.S. by bad weather. Final delivery was not until the 29th of December.

Posted By Dick in December, 2022

Source: Bizrate

Overall Rating -> 10

This business makes it easy to research and find all pertinent information about the individual gemstones and other information such as the recommend use (ring or pendent for example). Also it's important to know about things like hardness and durability of the gemstones. I also appreciate the history of purchases and transaction details. Just be sure to register on the website to get the best experience.

Posted By Greg in January, 2023

Source: Bizrate

Selected Gemstones

Gemstones A-Z

Buy 16 - 18 mm Opal Gems

2.38 ct Fancy Opal, 16.1 x 8.3 mm From Ethiopia

9.49 ct Oval Opal, 17.5 x 11.8 mm From Australia

3.4 ct Oval Cut Opal, 16.5 x 10.8 mm From Australia

6.2 ct Oval Cut Opal, 17.3 x 12.8 mm From Ethiopia

5.63 ct Oval Opal, 17.5 x 11.1 mm From Australia

5.5 ct Pear Cut Opal, 16.8 x 11.1 mm From Australia

1.56 ct Marquise Cut Opal, 16.4 x 6.5 mm From Australia

14.39 ct Green Opal, 17.5 x 15.1 mm Oval Cut From Brazil

5.37 ct Pear Cut Opal, 16.5 x 11.1 mm From Australia

6 ct Oval Opal, 16.2 x 11.2 mm From Australia

11.95 ct Green Opal, 17.3 x 15.9 mm Oval Cut From Brazil

2.64 ct Pear Cut Opal, 16.9 x 7.2 mm From Australia

3.93 ct Oval Opal, 17.3 x 10.8 mm From Australia

6.66 ct Green Opal, 16.3 x 11.8 mm Oval Cut From Brazil

4.32 ct Oval Opal, 17.4 x 10.3 mm From Australia

13.36 ct Yellow Opal, 16.7 x 12.9 mm Oval Cut From Brazil

6.18 ct Pear Opal, 16.9 x 12 mm From Australia

5.14 ct Fancy Opal, 16.2 x 13.5 mm From Ethiopia

1.71 ct Marquise Cut Opal, 16.1 x 6.4 mm From Ethiopia

14.28 ct Green Opal, 16.8 x 15.1 mm Oval Cut From Brazil

3.7 ct Pear Opal, 17.8 x 9.9 mm From Australia

14.17 ct Green Opal, 17.2 x 13.9 mm Oval Cut From Brazil

4.37 ct Cushion Cut Opal, 17.2 x 10.1 mm From Ethiopia

13.83 ct Green Opal, 18 x 13.8 mm Oval Cut From Brazil

14.2 ct Green Opal, 17.3 x 14.5 mm Oval Cut From Brazil

12.72 ct Green Opal, 17.9 x 14.4 mm Oval Cut From Brazil

15.08 ct Green Opal, 17.1 x 15.8 mm Oval Cut From Brazil

12.59 ct Green Opal, 16.9 x 14.8 mm Oval Cut From Brazil

12.46 ct Green Opal, 18 x 13.7 mm Oval Cut From Brazil

3.5 ct Pear Cut Opal, 16 x 10.1 mm From Australia

11.89 ct Green Opal, 17 x 14.1 mm Oval Cut From Brazil

11.8 ct Green Opal, 16.5 x 13.9 mm Oval Cut From Brazil

16 - 18 mm Opal Gems

Gemstone Information