Yixing Teapot is Utensil, Art, and Toy or Pet
Drinking tea with a Zisha (Purple sand, Yixing clay) teapot is fun and joy. You can rub it, enjoy the tea and the beauty of the teapot ( and it massages your hand and mind). The teapot will get prettier as it ages and appreciate in value. But it must be of real Zisha (most Yixing teapots on the internet are FAKE -- Chemical or None-Zisha).
The most important for the teapot is its clay. Most modern/cheap Yixing teapots use cheap or none Zisha clays with added chemicals (therefore can be TOXIC) to boost their appearances.
We try to show you what Old Yixing teapots are. First buy an old commodity teapot (cheap and easy to identify, such as this one) to learn what real Zisha is. Spend at least $100 or $200 for a teapot with a common clay type (Purple clay). See Modern Era Teapots and Clays (1949-1995)
Introduction to Yixing Zisha Clay Teapot or Yixing Teapot 101 (Avoid bright-colored Yixing teapots. I only use old ones)
Greatest Masters of All Times
SHI Dabin 时大彬 （Wanli reign of the Ming dynasty 1570-1662）
HUI Mengchen 惠孟臣 (Tianqi and Chongzhen reign of the Ming dynasty 1621-1644)
CHEN Mingyuan 陈鸣远 （Kangxi and Yongzheng reign of the Qing dynasty 1648-1734)
YANG Jichu 杨季初 （Yongzheng and Qianlong reign of the Qing dynasty 1723-1795）
YANG Pengnian 杨彭年 （Jiaqing and Daoguang reign of the Qing dynasty 1796-1850)
SHAO Daheng 邵大亨 （Daoguang and Xinfeng reign of the Qing dynasty 1821-1861)
Qing Dynasty Imperial 大清年制 (1644-1911)
GU Jingzhou 顾景舟 （ROC and PRC 1915-1996）