If you're interested in cloning citrus, you should know about the Citrus Clonal Protection Program
(CCPP). The CCPP "provides a safe mechanism for the introduction into California of citrus varieties from any citrus-growing area of the world" and "distributes citrus budwood in accordance to the California Department of Food and Agriculture regulations to anyone interested to propagate citrus trees for commercial or personal use". This is extremely important in the effort to prevent the spread of the Asian citrus psyllid and the deadly huanglongbing disease
. While the disease has not been found in Santa Clara County, it's important to follow good cultural habits to try to keep it that way.