13.2 carats - Beautiful dark oval cut Ethiopian Welo Opal

13.3 carats - Saturated Ethiopian Welo Opal

13.4 carat - Ethiopian Welo Opal with wonderful rainbows

13.5 carats - Brownish Ethiopian Welo Opal

13.5 carat - greyish oval cut Ethiopian Welo Opal

13.8 carat - Brilliant Ethiopian Welo Opal

14.1 carats - colorful Ethiopian Welo Opal

14.3 carat - Ethiopian Welo Opal with honeycomb pattern

14.4 carats - Very beautiful Ethiopian Welo Opal with chaff pattern

14.8 carats - Bluish Ethiopian Welo Opal

15.1 carats - Ethiopian Welo Opal with a light cell pattern

15.2 carat - oval cut Ethiopian Welo Opal with a beautiful pattern

15.2 carats - Beautiful Ethiopian Welo Opal with cell pattern

15.6 carat - greyish oval cut Ethiopian Welo Opal

16 Carat Brilliant Grayish Ethiopian Welo Opal

16.2 carat - Intense Ethiopian Welo Opal with matrix rock

16.3 carats - Ethiopian Welo Opal

16.3 carat - Oval cut transparent Ethiopian Welo Opal

16.7 Carat - Dark Luminous Ethiopian Welo Opal

16.7 Carat - Brilliant Ethiopian Welo Opal

16.8 carat - Teardrop-shaped Ethiopian Welo Opal