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Tattvartha Sutra
[3.1-6]
What is thickness, meaning the part from the top down to the bottom layer? The thickness of the first layer is one hundred and eighty thousand yojanas, the second one hundred and thirty-two thousand, the third one hundred and twenty-eight thousand, the fourth one hundred and twenty thousand, the fifth one hundred and eighteen thousand, the sixth one hundred and sixteen thousand, and the seventh one hundred and eight thousand yojanas. Below the seven layers, all the seven ghano-dadhi (concentrations of mass) circles have the same thickness, which is twenty thousand yojanas, and although the thickness of the seven ghana-vata (dense gases) and seven tanu-vata (subtle gases) circles is generally countless yojanas, they are not equal; that is, the thickness of the ghana-vata and tanu-vata circles below the first layer is distinct from that below the second layer, which also has a unique countless yojanas of thickness. Following this pattern, the thickness of the ghana-vata and tanu-vata circles of the sixth layer is also specifically greater than that of the seventh layer. The same applies to the sky.
The first layer, being filled with gems, is called Ratnaprabha. Similarly, the second, resembling sugar (gravel), is called Sharkaraprabha. The third, being primarily sandy (gravel), is called Valukaprabha. The fourth, having an abundance of mud, is called Pankaprabha. The fifth, having an abundance of smoke, is called Dhoomprabha. The sixth, characterized by darkness, is called Tamaprabha and the seventh, abundant in extreme darkness, is called Mahatamaprabha. The names of these seven are respectively Dharmā, Vanshā, Shaillā, Anjanā, Rishtā, Māghavyā, and Māvavī.
The third of the lower
There are three parts (kandas) to the Ratnaprabha layer. The uppermost first kharakanda is filled with gems, having a thickness of sixteen thousand yojanas. The second kand is Pabhula, with a thickness of eighty-four thousand yojanas. The third kand is Jalabahula, with a thickness of eighty thousand yojanas. The total thickness amounts to one hundred eighty thousand yojanas. There are no such kandas from the second to the seventh layers since substances like sugar, sand, etc., are uniform throughout. The first kand of Ratnaprabha is situated above the second, and the second above the third. The third kand is positioned on the ghano-dadhi circle, the ghano-dadhi on the ghana-vata circle, the ghana-vata on the tanu-vata circle, and the tanu-vata is established on the sky. However, the sky is not situated on anything but is self-established, as it does not inherently depend on another base. The basis of the second layer is its ghano-dadhi circle, which relies on the ghana-vata circle below it, and the ghana-vata relies on the tanu-vata circle below it.