The jewels would be delivered in exquisite gold-tooled leather boxes with compartments containing the relevant alternative mounts and fastenings, and a tiny screwdriver in its own velvet nest.
The jewels are quite expensive and their boxes exemplify this.
mnli hypothesis: The jewels are quite expensive and their boxes exemplify this. premise: The jewels would be delivered in exquisite gold-tooled leather boxes with compartments containing the relevant alternative mounts and fastenings, and a tiny screwdriver in its own velvet nest.