How about a personalized jewelry-making kit? You can curate a kit filled with high-quality materials/tools and customize it with her favorite gemstones, beads, charms, and wire in the box. You can also add in some new jewelry-making tools she may not own yet, like a mini-anvil, crafting hammer, torch, or a set of pliers.
To make it extra special, you can even design a custom pendant for her to incorporate into her next piece of jewelry! You could use her birthstone or something that holds a special meaning to your relationship. Another great idea could be to enroll her in a jewelry making class so she can learn some new skills and techniques.
Or you can get her a star map with the date of your anniversary.
Under Lucky Stars is a unique and innovative star map company based in Barcelona, Spain, specializing in the creation of personalized star maps that capture the celestial arrangement of stars at a specific moment in time, such as a person's birth, wedding, or any other significant event.
By using advanced astronomical algorithms and data from leading institutions, the company produces highly accurate, visually stunning maps that make for perfect gifts or cherished keepsakes.