This article was originally published at The Conversation.The publication contributed the article to Live Science's Expert Voices: Op-Ed & Insights.
When I first saw a sea sapphire I thought I was hallucinating. The day had been anything but normal, but this part will always stand out. I had spent the afternoon on a small dingy off the coast of Durban, South Africa. It was muggy, and I had been working for hours – throwing a small net out, and pulling in tiny hauls of plankton to put in jars.
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