There are no markings on the chain or pendant of any kind, but I do not believe it is real gold nor do I believe it's a real diamond inside the gold stone. But if you love goldstone sparkle, you'll love it! This necklace features an antique and celestial aesthetic, prominently showcasing a rectangular pendant made of goldstone, also known as "sandstone". This material is a type of glittering glass made in a low-oxygen reducing atmosphere, which gives it a distinct, starry sparkle that mimics a night sky filled with golden dust. The design is often associated with the late Victorian era (circa 1880s-1890s), where such pieces were commonly used as pocket watch fobs or decorative charms. Material: The primary element is copper-colored goldstone, valued for its deep brownish-orange hue and intense internal shimmer. Embellishment: The center typically features a small, sparkling accent, which in similar antique versions can be a clear stone, a compass, or an enamel fraternal emblem (such as those for the Odd Fellows or Masons). Overall Style: It blends a vintage, scholarly feel with a touch of whimsical sparkle, making it a versatile piece that feels both historical and mystical.