This is a high-quality yellow opal with excellent transparency. Some stones have a greenish hue. Although it's common opal, it has few inclusions, and the cut surfaces are smooth and sparkle beautifully. It's the birthstone for October. *One set* Contains 20 pieces Slightly misaligned holes Color variations *Size* Approximately 3mm *Shipping is via standard mail.* Customers who prefer Mercari delivery (Rakuraku Mercari) should send a message before ordering. A dedicated page will be created to change the shipping method. (Additional shipping charges may apply) ※Notes on ordering ◇Due to the natural material, there may be some chips or scratches. ◇The hole size is an estimate. Sometimes the tool doesn't fully exit during drilling, and the hole on the exit side may be smaller. Please widen the hole with a file or similar tool. Also, the hole size is the size of the hole itself and not the applicable material size. Furthermore, the size of all holes is not guaranteed. ◇Some beads may have holes that are not drilled straight. Please understand that this is unrelated to the hole size. ◇The bead size is an approximate size. Please understand that there may be an error of approximately ±0.5mm. ◇The displayed colors may differ slightly depending on your monitor. ◇Please inquire if you have any questions before purchasing. ◇Packaging will be in a cellophane bag, etc., wrapped in air-cushion packaging. ◇Gift wrapping is not available.