Well perhaps it is sad, from the spiritual point of view, but we are all on our own path. This lady is not actually hurting more than herself in all this - and maybe that is the path she needs to follow in order to find her own meaning in life. We all follow our path, as best we can. Who are we to say - she is shallow, she is wrong?
The Ace of Pentacles is an interesting card. I've always seen the Pentacles as a bridge between matter and spirit - or more than that, the symbol of spirit in matter. Gone are the days, I hope, when we separate the two. The Ace represents the essence, the distillation of that link. It could be that her spiritual path goes via jewellery (or she could just be a greedy gold-digger - but then I'd have expected another card than this beautiful garden card).
I believe that jewellery has often been used as a metaphor for beauty and virtue - though a good woman is supposed to be worth more than rubies, according to King Solomon's Proverbs - and he should know
And I ask a question: is the desire to receive a piece of jewellery from one's lover worse than the desire to receive a pack of cards, or a holiday - sentiments I have seen expressed on this forum? Love is a feeling, granted, but it also relies on gestures, and the gift of jewellery is a time-honoured gesture between lovers. Of course, if her question was - "how big will that rock be?" then we can question her feelings for this guy in the first place