A Line That HoldsThe player's field guideThe Meridian Reach
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Redeem a coal assay

Hand in one Coal and the listed assay tickets. The counter issues one random graded gemstone from its assay stock, with the displayed weighted chances; doubling yields two of that same stone. An exchange of goods, not a change in their substance.

Trade
Field Engineering
Required trade level
70
Base trade XP
32
Base work interval
2 s

Base ingredients

Before preservation, discounts or a selected input option.

ItemQuantity
Coal1

Base supply tickets

Alternative supply tickets

Base work outcomes

Mastery and other outcome modifiers may change these base shares.

OutcomeBase chanceDirect goods
Gem100%None

Gem weighted finds

This draw occurs inside the Gem outcome; it is not an independent roll on every cycle.

ItemQuantityBase chance / draw share
Topaz1Weight 20 / 40
Sapphire1Weight 7 / 40
Ruby1Weight 7 / 40
Emerald1Weight 4 / 40
Diamond1Weight 2 / 40

Timing and yield

The table gives content-defined base values. Your tools, equipment, mastery, outcomes and other active modifiers determine the current quote. Failed or random work does not promise a successful output on every cycle.