Professional tips for making great guacamole
“…To check the ripeness of the fruit (we all know avocado is a fruit, yes?), Rodarte suggests looking for two indicators. First, touch. Gently press the skin and “it will tell you right away if it’s soft.” Second, break off the little piece of stem at the top of the avocado and look at the little navel-like circle underneath. If it’s bright green, the avocado should be ripe. White is under-ripe, and brown is past its prime…”
https://www.columbian.com/news/2024/may/08/professional-tips-for-making-great-guacamole/