Wa `alaykum as-salamu wa rahmatullahi wa barakatuh.

If your husband is in a tight financial situation and cannot afford to offer sacrifice, then he is excused. You are not obligated to sell your jewelry to offer sacrifice.

Sacrifice –  as ruled by the majority of scholars –  is not an obligatory duty; rather it is only recommended. So, if anyone cannot afford to do it, he or she incurs no blame or sin. Allah does not impose duties that are beyond our ability or means to fulfill.

Almighty Allah knows best.