Changes

** 1-3 [[Stone]]: possible anywhere (8-20% depending on location)

** 1-3 [[Stone]]: possible anywhere (8-20% depending on location)

** 1-3 [[Clay]]: possible anywhere (24-60% depending on location)

** 1-3 [[Clay]]: possible anywhere (24-60% depending on location)

** An unseen [[Secret Note]]: up to 5% chance, only if the player has a [[Magnifying Glass]]<ref name="secret_note" />

** An unseen [[Secret Notes|Secret Note]]: up to 5% chance, only if the player has a [[Magnifying Glass]]<ref name="secret_note" />

**Starting [[Summer]] 1 of year 1:  1 [[Warp Totem: Farm]], [[Warp Totem: Mountains]], or [[Warp Totem: Beach]] can replace [[Clay]] (10% chance)

**Starting [[Summer]] 1 of year 1:  1 [[Warp Totem: Farm]], [[Warp Totem: Mountains]], or [[Warp Totem: Beach]] can replace [[Clay]] (10% chance)

<ref name="day_update">Artifact Spots are spawned and destroyed by <samp>GameLocation::spawnObjects</samp>. Note that <samp>GameLocation::dayUpdate</samp> can call <samp>GameLocation::spawnObjects</samp> multiple times on some days (three calls on Sunday; two calls on first day of the month; two calls on each of first three days of game).  Therefore spawn rates and removal rates can be nearly three times faster on some days.</ref>

<ref name="day_update">Artifact Spots are spawned and destroyed by <samp>GameLocation::spawnObjects</samp>. Note that <samp>GameLocation::dayUpdate</samp> can call <samp>GameLocation::spawnObjects</samp> multiple times on some days (three calls on Sunday; two calls on first day of the month; two calls on each of first three days of game).  Therefore spawn rates and removal rates can be nearly three times faster on some days.</ref>

<ref name="removal">The removal algorithm is fully random (it does not use a seeded random number generator), so which artifact spots disappear at the end of a day can change if the entire day is replayed.</ref>

<ref name="removal">The removal algorithm is fully random (it does not use a seeded random number generator), so which artifact spots disappear at the end of a day can change if the entire day is replayed.</ref>

<ref name="secret_note">Once the player has a [[Magnifying Glass]], any [[Clay]] found in an artifact spot has a chance of being replaced by an unseen [[Secret Note]]. If the player has seen all possible secret notes, Clay is found. The chance of being replaced ranges from 1.3% to 9% depending upon how many notes have been seen, see <samp>GameLocation::tryToCreateUnseenSecretNote</samp>.</ref>

<ref name="secret_note">Once the player has a [[Magnifying Glass]], any [[Clay]] found in an artifact spot has a chance of being replaced by an unseen [[Secret Notes|Secret Note]]. If the player has seen all possible secret notes, Clay is found. The chance of being replaced ranges from 1.3% to 9% depending upon how many notes have been seen, see <samp>GameLocation::tryToCreateUnseenSecretNote</samp>.</ref>

<ref name="islandnorth">See <samp>StardewValley.Locations.IslandNorth::digUpArtifactSpot</samp> in the game code</ref>

<ref name="islandnorth">See <samp>StardewValley.Locations.IslandNorth::digUpArtifactSpot</samp> in the game code</ref>

<ref name="islandsouth">See <samp>StardewValley.Locations.IslandSouth::digUpArtifactSpot</samp> in the game code</ref>

<ref name="islandsouth">See <samp>StardewValley.Locations.IslandSouth::digUpArtifactSpot</samp> in the game code</ref>