Revelation 18:14

The fruit that your soul longed for
Literally, the fruit of the lust of the soul of you. They had coveted commercial goods which God had now destroyed.

Do not love the world or the things in the world. If anyone loves the world, the love of the Father is not in him. For all that is in the world—the lust of the flesh, the lust of the eyes, and the pride of life—is not of the Father but is of the world. And the world is passing away, and the lust of it; but he who does the will of God abides forever (1Jn. 1Jn. 2:15-17).

the things which are rich and splendid
Things which are rich is λιπαρὰ [lipara] , oily, fat luxurious things. Things which are splendid is λαμπρὰ [lampra] , bright, shining, glittering things. These items indicate great emphasis upon self-gratification and sensual living which feeds the flesh:

But know this, that in the last days perilous times will come: for men will be lovers of themselves, lovers of money, boasters, proud, blasphemers, disobedient to parents, unthankful, unholy, unloving, unforgiving, slanderers, without self-control, brutal, despisers of good, traitors, headstrong, haughty, lovers of pleasure rather than lovers of God. (2Ti. 2Ti. 3:1-4) [emphasis added]

you shall find them no more at all
οὐκέτι οῦ μὴ αὐτὰ εὑρήσουσιν [ouketi ou mē auta heurēsousin] , no longer, no not they shall be found. The double-negative, οὐ μὴ [ou mē] , combined with no longer (οὐκέτι [ouketi] ) strongly emphasizes the impossibility of ever finding these commercial items in her any more. This hints at the manner of her destruction which is permanent and irreversible.