In the 1800's jewelry was even more valuable than it is today, so each piece was made to be as versatile and wearable as possible- like this star, that
Necklaces Maloy's Jewelry
Jewellery - Wikipedia
Victorian Diamond Starburst Pendant Necklace
Victorian Diamond Star Pendant, Solid 925 Sterling Silver Gold Pendant, Chain Link Necklace Pendant, Handmade Small Pendant Gift for Her
jewelry jewellery – The Pragmatic Costumer
Jeweller - November 2021
Circa 1900 Diamond Star Pin/Pendant – Pippin Vintage Jewelry
Brooches Archives - Diamonds in the Library
Victorian Seed Pearl and Diamond Starburst Pendant Brooch – The Veiled Mirror
Exceptional Antique Victorian 14K Gold Diamond Star Locket – Boylerpf
Black Hills Gold Pear-Shaped Onyx Pendant
How to choose? Like snowflakes, all are subtly different. This pretty example has space introduced by the central elements being separate - they're invisibly attached from underneath. It retains its easily screwed in brooch fitting, so it can be worn as both brooch and pendant. And it is quite deeply angled away from the base, providing interesting depth.
Victorian Diamond Star Pendant/Brooch, from About 1900
Antique Brooch Necklace - 572 For Sale on 1stDibs