Please read the profile as well. This is a charm featuring an approximately 8.7mm Ethiopian opal. Excellent play-of-color. *There is a very small indentation on the back. Please consider purchasing if you are okay with this. Chain is not included. I have confirmed that a 3.5mm wide clasp can pass through the triangle clasp. [Metal Fittings] Triangle clasp Color: Gold Material: Brass [Natural Stone] Ethiopian Opal Approximately 8.7mm (±0.5mm) with a hole ✦Due to the nature of Ethiopian opals, the color may change depending on the climate (humidity, dryness, etc.). Please consider this before purchasing. Please avoid wearing it when bathing or using a hairdryer. ✦After wearing, it is recommended to wipe it with a soft cloth and store it in a zip-lock bag. Please avoid cleaning with an ultrasonic cleaner or steam cleaner. ✦The item in the image will be delivered. The play-of-color may not be visible or the stone's appearance may change depending on the indoor/outdoor environment and the lighting in the room. The image may differ from the image you have in mind depending on the environment at the time of receipt. Please use the images as a reference. ✦As it is a natural stone, there may be cracks, inclusions, small scratches, or indentations on the surface. Thank you for your understanding. ✦Please handle with care. Also, please consider purchasing if you understand that this is a handmade item. #pendanttop #necklacecharm #naturalstonenecklace #naturalstonecharm #opal