Jecha rine ruvara rwechisikigo rinobva zvakananga kuPasi. Rinobva kumatombo nemaminerari ane pigments. Iron oxide ndeimwe yemavara echisikigo anowanzoonekwa, anokonzera mithunzi mitsvuku, yeorenji, uye brown inowanikwa mujecha dzakawanda dzechisikigo. Semuenzaniso, mavara matsvuku-brown ejecha remugwenga mamwe anokonzerwa nehuwandu hwe iron oxide. Manganese inogona kuunza mavara matema kana epepuru, nepo copper compounds inogona kubatsira kumavara egirini nebhuruu. Kuburitswa kwejecha rine ruvara rwechisikigo kunotanga nemabasa ekuchera mumatombo kana murwizi uko kune nzvimbo idzi dzine ruvara. Kana zvacherwa, zvinhu zvakacherwa zvinoitwa matanho akatevedzana ekugadzirisa. Kupwanya matombo makuru kuita zvidimbu zvidiki, zvichiteverwa nekusefa kuti jecha riparadzanise saizi dzakasiyana dzezviyo. Kusuka kunozoitwa kubvisa tsvina dzakadai sevhu, guruva, nezvimwe zvinhu zvisingadiwe, kuve nechokwadi chekuti jecha rine mwero wakanyanya wekuchena uye kusimba kweruvara rwaunoda.

Jecha rine ruvara rwekugadzira, zvakasiyana, rinogadzirwa kuburikidza nemaitiro akagadzirwa nevanhu. Kazhinji, chinhu chepasi, kazhinji jecha re quartz nekuda kwekuwanda kwaro, kuomarara, uye ruvara rwakasununguka, chinoshanda sehwaro. Nzira dzepamusoro dzekugadzira pigment dzinoshandiswa kuputira kana kudhaya zvidimbu zvejecha re quartz. Vagadziri vanoshandisa pigments dzemhando yepamusoro uye zvinobatanidza zvakanyatsonaka kuti vave nechokwadi chekuti ruvara rwacho runonamatira zvakasimba kumatombo ejecha. Nzira dzekugadzira dzakagadzirwa neunyanzvi dzinogona kugadzira ruvara rwakafanana uye runogara kwenguva refu, zvichibvumira mavara akasiyana-siyana angave akaoma kuwana zvakasikwa. Kuburikidza nekudzora kwakanyatsonaka kwemaitiro ekugadzira, jecha rine ruvara rwekugadzira rinogona kuwana hunhu hwemavara hwakafanana uye kugoverwa kwehukuru hwezvidimbu, zvichisangana nezvinodiwa zvemaindasitiri akasiyana-siyana.