The Vegan conduct states that I can eat:
- food rations, cram rations, K-rations, C-rations and lembas wafers
- melons, oranges, carrots, pears, apples, bananas, kelp, eucalyptus, garlic, wolfsbane, and user-defined fruit
- the corpse of any monster (or a tin of its ‘meat’) represented by
- tins of spinach
Vegans can indeed eat jewelry. From the guidebook:
A strict vegan diet is one which avoids any food derived from animals.
The primary source of nutrition is fruits and vegetables. The corpses
and tins of blobs (`b’), jellies (`j’), and fungi (`F’) are also
considered to be vegetable matter. Certain human food is prepared
without animal products; namely, lembas wafers, cram rations, food
rations (gunyoki), K-rations, and C-rations. Metal or another normally
indigestible material eaten while polymorphed into a creature that can
digest it is also considered vegan food. Note however that eating such
items still counts against foodless conduct.
Metal or another normally indigestible material eaten while polymorphed into a creature that can digest it is also considered vegan food.