Satyamani Nandi and Sumeru are made of clear quartz crystals. Nandi is the name of the bull which serves as the mount of Lord Shiva and as the gatekeeper of Lord Shiva and Goddess Parvati. It is auspicious to keep Nandi in the house or office to seek blessings from Lord Siva. Nandi is also a sign of fulfillment and abundance. Sumeru Yantra symbolizes Narayan and Lakshmi together as one. People who are desirous of having wealth should establish this yantra at their home. Quartz Sumeru Yantra is one of the luckiest, vital and powerful Yantras, which not only gives the utmost benefit, but also confirms auspiciousness for almost every person. It is the source of achieving all worldly desires & fulfilling all wishes through attracting universal cosmic power & mental power. (Rest of the details will send you along with the product) Note: these are natural stones so there may be the difference in color and in drawing of the stone as per their occurrence in the nature. The stones have grains in them which are due to their crystal structure. These are natural stones so they are not completely finished some cracks and holes are there due to the variation of hardness in stones. You will get 100% similar product as per the availability in the stock.