Moving on to the colour of the infusion, a good quality brew should either be golden orange or red with a high level of transparency. The last few concentrated drops from the pot will present a brilliant amber hue.
Finally, inspect the spent tea leaves. You will notice a rather soft leaf blade with a dark red oxidised appearance on the leaf's periphery and a central yellowish green region.
What is often stressed during tea lessons is the engagement of our senses: the eyes, nose and mouth. Hence, when it comes to spotting the real deal, we rely heavily on looking, smelling and tasting.