Here are a few descriptions for the WordPress post tag “橄欖石” (Gǎnlǎnshí – Olivine) in Traditional Chinese, catering to different levels of detail and potential SEO considerations:

**Option 1: Concise & Direct (Ideal for general use)**

> 橄欖石 (Gǎnlǎnshí) 是一種美麗的綠色寶石，也被稱為鎂橄欖石。

* **Translation:** Olivine (Gǎnlǎnshí) is a beautiful green gemstone, also known as peridot.
* **Why it works:** Simple, informative, and includes a basic alternative name for clarity.

**Option 2: Slightly More Descriptive (Adding characteristics)**

> 橄欖石 (Gǎnlǎnshí) 是一種迷人的綠色寶石，因其鮮豔的色彩和獨特的晶體結構而受到人們的喜愛。這種寶石通常帶有橄欖綠的色調，並且在不同的光線下會呈現不同的光澤。

* **Translation:** Olivine (Gǎnlǎnshí) is a fascinating green gemstone, loved for its vibrant color and unique crystal structure. This gemstone usually has an olive-green hue and displays different luster under varying light conditions.
* **Why it works:** Introduces visual appeal and highlights key characteristics relevant to jewelry or gemstone articles.

**Option 3: SEO Focused (Includes Search Terms)**

> 橄欖石 (Gǎnlǎnshí) 是一種受歡迎的寶石，同時也被稱為鎂橄欖石或橄欖石。 了解關於橄欖石的產地、歷史、顏色、價值和如何保養的更多資訊。 尋找您完美的橄欖石首飾？ 在這裡探索更多！

* **Translation:** Olivine (Gǎnlǎnshí) is a popular gemstone, also known as peridot. Learn more about the origins, history, color, value, and care of olivine. Looking for your perfect olivine jewelry? Explore more here!
* **Why it works:** Contains crucial keyword phrases for search engines, and could indirectly promote the linking of relevant jewellery resources.

**Option 4: For Jewellery Related Posts**

> 需要尋找橄欖石 (Gǎnlǎnshí) 首飾？ 橄欖石是一種優雅的綠色寶石，非常適合用於戒指、吊墜和耳環。 了解橄欖石的魅力，挑選最適合您的款式，並探索橄欖石在全球的最佳採礦地點。 立即探索更多橄欖石設計！

* **Translation**: Need to find Olivine (Gǎnlǎnshí) jewelry? Olivine is an elegant green gemstone that’s perfect for rings, pendants, and earrings. Learn about the charm of olivine, choose the style that suits you best, and explore the best mining locations for olivine worldwide. Explore more olivine designs now!
* **Why it works:** Focused on the practical uses of the stone and its connection to jewellery, and suggests a call to action to learn and purchase.

**How to Choose:**

* **Consider your audience:** If you’re writing for a general audience, the first option is perfect. For gemstone enthusiasts, the second might be better. If you want to drive search engine traffic, use the third option. And for jewelry related posts, choose the fourth option.
* **Keep it concise:** WordPress tags are best kept relatively short and sweet.
* **Keywords:** Include relevant keywords, especially if you want people to find your content through search engines. “橄欖石,” “寶石,” “鎂橄欖石,” “橄欖綠,” or “首飾” are excellent choices depending on the post’s content.
* **Relevance:** Ensure the description accurately reflects the content associated with this tag.

Remember to adjust the description to fit the specific goals of your WordPress site and the type of content you are publishing.