How much iridium is on Earth?

Inquiring minds often seek answers to intriguing questions, such as: "How much iridium is present on our planet Earth?" This question piques the curiosity of scientists and researchers alike, as iridium is a rare and valuable metal with numerous applications in modern technology. Could you elaborate on the estimated quantity of iridium found within our planet's crust, oceans, and possibly even its atmosphere? Understanding the abundance of this metal could have significant implications for its future use in industries ranging from aerospace to medical devices. The answer to this question may hold the key to unlocking new possibilities in our ever-evolving technological landscape.