It seems like you’re referring to a 5x5x12″ Onyx lamp, which I assume to be a specific type of lamp made from onyx stone. Onyx is a type of sedimentary rock known for its translucent properties and unique color variations.

The potential benefits of having an onyx lamp could include:

1. Aesthetic Appeal: Onyx is prized for its natural beauty and unique patterns, which can create a visually appealing and elegant look. The lamp may provide a warm and soothing glow, adding to the ambiance of a space.
2. Unique Patterns: Each piece of onyx is unique, so your lamp will have its own distinct patterns and colors, making it a one-of-a-kind addition to your space.
3. Potential Health Benefits: Some proponents of natural stone lamps, including those made from onyx, claim potential health benefits. This includes the release of negative ions into the air, which are believed by some to have positive effects on mood and overall well-being. However, scientific evidence supporting these claims is limited.
4. Variety: Onyx comes in various colors and patterns, allowing you to choose a lamp that complements your decor. Common colors include shades of white, beige, multi green, and brown.
5. Spiritual and Metaphysical Beliefs: Some people ascribe metaphysical properties to onyx, associating it with grounding energy and balance. In various spiritual traditions, onyx is believed to have protective qualities and may be used for meditation or energy work.
6. Translucency: Onyx has natural translucency, meaning it allows light to pass through to some extent. This property can result in a soft, diffused glow when the lamp is illuminated, creating a calming atmosphere.
7. Decorative Element: Beyond its functional purpose as a light source, an onyx lamp can serve as a decorative element in a room, acting as a unique focal point.

While onyx lamps can offer these potential benefits, it’s important to note that individual experiences may vary, and the perceived benefits may be subjective. If you’re interested in these lamps for any specific reason, it’s a good idea to consider both the aesthetic appeal and any potential symbolic or metaphysical meanings associated with onyx in addition to their practical use as a light source.