Top Most Beautiful Yixing Clays

Snow Iron Sand : YiXing Zisha Clay Teapot by GU Honglian 顾红莲雪铁砂水平壶

Extremely rare.  The only one I have encountered

DouBiNi (Mung Bean Paste Clay):  SHI Dabin 时大彬 Ming YiXing Zisha Teapot DouBiNi (Mung Bean Paste) clay SHI Dabin 明万历时大彬制豆碧泥印包壶

ZiNi or ZhuNi Purple : Qing Qianlong YiXing Zisha Teapot ZhuNi clay by SHAO Chunyuan 清乾隆邵春元茄紫朱泥高八瓣壶

ZiNi (very long Fermentation) : YiXing Zisha Teapot HE Daohong mark 何道洪极品紫泥匏瓜壶

ZhuNi Light Brown : Qing or late Ming YiXing Zisha Teapot ZhuNi clay by LI Maolin 李茂林朱泥诗文思亭壶

DiCaoQing Chocolate-like: YiXing Zisha clay Teapot by GU Jingzhou 顾景舟云汉壶

ZhuNi Bright Red: Qing YiXing Zisha ZhuNi Clay Teapot by ShangGuTang 清尚古堂朱泥仿古壶

Not sure how to describe this.  "Guifei out of Bath" (贵妃出浴）?

DiCaoQing: YiXing Zisha Teapot DiCaoQing clay by XU HanTang 徐汉棠石瓢壶

5) Tianqing Clay: Ming YiXing Zisha Teapot Tianqing clay by HUI Mengchen 明惠孟臣天青泥如意刻纹圆壶

4) ZiNi Grey Purple : Qing Qianlong YiXing Zisha Clay Teapot by SHAO Chunyuan 邵春元紫灰泥彩泥绘花鸟纹壶

3) Chestnut Purple: ShiDabin时大彬熟栗紫高灯壶

3) Black Dotted Clay: Qing YiXing Zisha Black Dotted Clay Teapot by YANG Pengnian 清道光 杨彭年原矿黑星土周盘壶

2) ZhuNi Purplish Red: Qing Qianlong YiXing ZhuNi glass-jade-like Teapot by SHAO Shenghe 清乾隆圣和玻璃种紫红朱泥壶

1) Likely Tianqing Clay: Qing Kangxi YiXing Zisha Teapot by SHAO Boyuan 清康熙邵柏原包锡诗文壶