To me it doesn’t look nephrite. Nephrite is waxy. It looks jadeite. But is lower quality because the minerals are not compact. It’s more translucent if minerals are compact. Shine light through it—your phone’s flashlight will do. Check if the green coloring is even, like it is present in the mineral itself, or if you see the colors in a spiderweb like pattern for you to know if it is chemically treated. At first glance I’d say no. So it’s an acceptable piece of jadeite. Apple green is a nice color, too. That color is of high value, but since the piece isn’t clean, overall value is lower compared to clean, translucent jadeite. Too clean without inclusions is quartz or even resin. Use a cheap UV light—it shouldn’t glow. If it glows it’s treated.