All forms of Class I nickel will be traded on the company’s platform, but the spot index will be defined by briquettes and full-plate cathodes, the two most liquid physical shapes.

Source: https://www.thesudburystar.com/opinion/columnists/andy-home-new-year-new-nickel-market-after-lmes-2022-meltdown

It is similar to lighter fluid – the kind used to help light charcoal briquettes, although condensate can range in color from clear to amber.

Source: https://seekingalpha.com/article/4636385-targa-resources-growing-organically?source=feed_all_articles

Leta told NAN that a number of alternatives can be explored by Nigeria, such as biomass based briquettes which are eco-friendly.

Source: https://guardian.ng/features/poisonous-ponmo-and-nigerias-untapped-recycled-tyre-ecosystem/