Crystal-flecked sandstone

Crystal-flecked sandstone is an ingredient used to create crystal flasks. It requires 81 Mining to obtain, but can be turned into crystal glass using a robust glass machine at any Crafting level. 89 Crafting is required to turn the glass into flasks, giving 150 Crafting experience each.

50 crystal-flecked sandstone can be mined from the crystal-flecked sandstone mine in the Ithell Clan district once per day. A further 25 can be mined per day in the Edimmu resource dungeon, if the player meets the 115 Dungeoneering level requirement to access the dungeon and is a possible reward from the Motherlode Maw. The daily limit resets at 00:00 UTC. Any amount of crystal glass can be made in one day.

Bonus
There are a few ways to increase the number of crystal-flecked sandstone mined in a day.

Shooting Star
It is possible to mine more than the maximum daily amount with the reward from Shooting Stars, which gives the player a chance of receiving double ore. Assuming the player is mining all the crystal-flecked sandstone available, the effect of the reward given by the shooting stars will allow the player to mine up to about 34 extra pieces per day.

Resourceful aura
The Resourceful aura can also be used to slow the depletion of the sandstone rock.

Collector's insignia
The Collector's insignia can also be used to slow the depletion of the crystal-flecked sandstone rock.