In Genshin Impact, materials and utility items are extremely plentiful, and you don't always know where to find them. Purchase, loot, monster to kill? Some riches in the world of Teyvat only ask you to stoop to be picked up. This is the case with the lapis heart, which is found in several areas of the map.
The map above is still indicative, but it shows where you will find the largest deposits of Cor Lapis (you can still find other small deposits elsewhere on the map). It's therefore towards the heights of the Cuijue slope that you can head without hesitation.
Walk through mines and cliffs and you should easily come across some deposits of Cor Lapis. These are easily recognizable by their orange color.
However, these mineral chunk will take a long time to break down into pieces. The best technique will therefore be to use a large sword, in order to break the rock effectively.
Original content by Romain "Zorg" Becquelin.
