In several Ages you will find a floating spark like in the picture below. The spark moves in the shape of an 8 or the mathematical infinite symbol. Underneath the spark is a symbol on the ground consisting of a sun, a moon crescent and three small swirls. The Sparks are also called Sparkle, Sparklie, Sparky or Blue Flame, depending on who you talk to.
Originally, Uru didn't have the Sparks. They were added during the GameTap era (2007/2008). Each spark represented one month of the year, making a total of 12 sparks. At first, each spark was only available in the month that it was added. This was changed a few years later. Each spark became available for the entire year. Oddly, only in MOUL became the sparks available the whole year, as the Shards remained in the old behaviour of making only one spark available each month. The following calendar therefor only applies to the Shards:
Spark 01 January Gahreesen: Training hallway Spark 02 February Kadish Tolesa: Pillar room Spark 03 March Eder Gira: In the lake Spark 04 April Gahreesen: In the prison Spark 05 May Descent / Great Shaft: Resting area, on the wall Spark 06 June Minkata: In cave 2 Spark 07 July Er'cana: Near the broken track Spark 08 August Jalak Dador: On the middle pillar Spark 09 September Teledahn: By the niche with the linking book to spy room Spark 10 October Phil's Relto: On the dock Spark 11 November Great Zero: Calibration room Spark 12 December Myst Library: Center of the room
Before you can collect the sparks, you need the Sparklie Island Relto Page. This page is found in the campfire near Zandi's campment in the desert. It gives you an extra island in Relto. Each time you walk through a different spark, a stone candle will be added to this island. After all 12 sparks have been collected, a fireworks will start.