looks like a glazed porcelain crucible, not good for thermal shock, generally used in an electrically controlled furnace where heat ramp and rundown are controlled.
You have not stated your purpose on use, stick to what everyone uses, use a quartz silica melting dish, they will cope with direct flame have excellent thermal properties and fantastic thermal shock resistance, glaze with a thin layer of borax and you are good to go, cheap to replace and you can can buy a stack so you have some on hand specifically for certain metals, karat alloys, purities etc so you dont contaminate your 3N or 4N silver crystal in a dirty melt dish, that simply undoes all your hard work.
If you have an open flame furnace you have a few choices, clay graphite being the most popular and probably the cheapest, most abuse resistant regarding thermal shock, DO NOT use Borax on your Clay Graphite Crucible!!! it is highly caustic and will ruin your crucible by degrading the inner lining and you will end up with graphite contamination in your metal.
I would not recommend pure carbon crucibles for open flame furnaces, you can use it but will degrade by far quicker than using it in an electric funace as it is intended.
All crucibles have a finite life, the ones mentioned are general purpose and common.........for a reason. Stay away from exotic gear until you understand exactly what you need for your intended purpose, speak to a refractory agent regarding your needs if you will but ensure you disclose EXACTLY what your intention/application is and your equipment before you purchase anything.
Play safe
Regards
B.