Which of these are meant to be worn on their own versus added to something I already own?
The Pandora ladybug charm is explicitly designed to click onto a Moments-compatible bracelet you'd need to already own — it isn't a standalone piece. Everything else here (studs, pendants, and the Alex and Ani bangles) is sold as a complete, wearable piece on its own, though the bangles are also designed to stack with others in the same line.
Are any of these solid gold or solid silver rather than plated or costume metal?
The Kendra Scott pendant is listed as 14k gold-plated, and the Pandora charm is listed as sterling silver with enamel. The Betsey Johnson studs are typical costume jewelry, and the listing titles for the Kate Spade, Alex and Ani, and Swarovski pieces don't specify solid precious metal, so confirm material claims in the full listing before assuming fine-jewelry status.
Is the Swarovski x Ariana Grande listing one piece or a set?
The title lists a brooch, pendant necklace, and earrings together as a collection, but specific listing variants may sell these separately or as a set. Check the exact variant and included pieces on the live listing before buying, since the title covers the full collection name rather than confirming bundle contents.
Which pieces actually show an animal or insect on them, versus just fitting the trend by brand association?
The bee earrings, bee bangle, dragonfly collection, ladybug charm, and butterfly bangle all name their motif directly in the listing title. The Kate Spade studs and Kendra Scott pendant do not specify an animal or insect motif in their titles, and the Harry Potter piece uses a keys motif, not a creature, so confirm photos before assuming a critter theme.
Are any of these good as gifts specifically, rather than for personal everyday wear?
The Pandora ladybug charm is explicitly marketed in its own title as a gift piece, and the Swarovski collaboration's collector status and named artist partnership also suit gifting. The stud earrings and bangles read more as everyday personal pieces based on their listings, though nothing here is described as gift-exclusive beyond the ladybug charm.