Jealousy guards what envy covets — jealousy fears losing what is yours; envy aches for what is theirs. Both are wanting's shadow, and both are informative: the dream's jealousy shows what you fear losing, its envy shows what you actually want.
Positive Resonance
Desire mapped precisely by the ache, the guarded named
Shadow Aspect
Corrosion by comparison, wanting's acid, the green interior
Nuances
Jealous of a partner: the bond's fear speaking
Envying another's life: your unlived want located
The jealousy unfounded: the fear exceeding the fact