Tetracompass (unpowered)

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Tetracompass (unpowered) detail.png

A tetracompass (unpowered) is an artefact that can be restored with level 50 Archaeology. It can be turned into a tetracompass (powered) by powering it near the mysterious monolith at the Archaeology Campus, granting 970 Archaeology experience, up to ten at a time.

Tetracompass pieces are always dropped in order: left, right, dial, needle.

Ironmen players cannot restore tetracompasses until level 76 Archaeology (although it can be boosted), as this is the requirement to excavate malachite green and Armadylean yellow, both of which are the highest level materials required for its restoration.

The tetracompass (unpowered) in the journal.
A player powering up a tetracompass.

Artefact info[edit | edit source]

Tetracompass (unpowered)
Chronotes[art 1] None
Alignment None
Dig site None
Excavation hotspot None
Collections This artefact is not part of a collection.
Description The origins of this artefact are unclear, but it appears to incorporate elements from the four main factions that fought in the God Wars. There also appears to be trace elements of a fifth faction, which brings into question the 'tetra' naming.
  1. ^ This is amount for trading in the artefact at the listed collectors. A part of the collections give an additional amount of chronotes upon completion. The amount in the parentheses is the amount obtained when donating to the museum donation bin, which will give only 40% of the amount one would get from a collector.

Creation[edit | edit source]

Tetracompass (unpowered).png Tetracompass (unpowered)
Archaeology-Make-X hourglass icon.pngMake-X GE icon.png
2,065 XP-10 (6s) / 8 (4.8s) [r 1]-
Archaeology Archaeology level50
Archaeologist's workbench Must be performed at an archaeologist's workbench
P2P icon.png Members only
Tetracompass piece (left).pngTetracompass piece (left)1N/A-
Tetracompass piece (right).pngTetracompass piece (right)1N/A-
Tetracompass piece (dial).pngTetracompass piece (dial)1N/A-
Tetracompass piece (needle).pngTetracompass piece (needle)1N/A-
Malachite green.pngMalachite green3011,404342,120
Cadmium red.pngCadmium red308,541256,230
Cobalt blue.pngCobalt blue3011,267338,010
Armadylean yellow.pngArmadylean yellow3010,956328,680
Tyrian purple.pngTyrian purple307,965238,950
Total price1,503,990
  1. ^ When wearing the master archaeologist's outfit.

Tetracompass value[edit | edit source]

The average loot value of an ancient casket from a tetracompass, only factoring archaeology materials, is 2,662,550 coins. This assumes an average of 5 material rolls (4-6 is the range for each ancient casket), and that each material has the same drop rate. As with all drop rates, results may vary.

The profit of a tetracompass (as shown in the table below) can be calculated because pieces are given from certain Archaeology collections. The following formula is used:


  • is the profit from acquiring and restoring one tetracompass (a negative value means the value of the chronotes received in the process is lower than the cost of the materials spent to acquire and restore the tetracompass)
  • is the value of the chronotes given on completion of the collection each time (both for the individual artefacts and the collection as a whole)
  • is the material cost of restoring all of the artefacts to complete collection
  • is the number of times the collection needs to be completed to receive the pieces for a full tetracompass
  • is the cost of the materials to restore the tetracompass (as shown in the table above)
Archaeology Level Collection Number of hotspots Artefacts XP Profit of tetracompass (T) Net profit (T+Av casket loot value) Net profit per collection Net profit per artefact Notes
67 Urns of the Empire 5 5 15,906.6 −1,601,214 1,061,336 265,334 53,066.8
72 Saradominist II 3 9 36,400 −3,347,902 −685,352 −171,338 −19,037.56
81 Zamorakian II 4 9 40,133 −5,508,426 −2,845,876 −711,469 −79,052.11
83 Green Gobbo Goodies I 2 5 34,534 −3,450,386 −787,836 −196,959 −39,391.8
94 Red Rum Relics I 2 4 41,444 −3,344,718 −682,168 −170,542 −42,635.5
97 Green Gobbo Goodies II 3 5 60,667 −2,800,942 −138,392 −34,598 −6,919.6
100 Saradominist III 3 6 77,778 −1,886,970 775,580 193,895 32,315.83
104 Zamorakian III 3 8 141,000 −6,675,438 −4,012,888 −1,003,222 −125,402.75
110 Red Rum Relics II 3 4 81,333 −1,985,006 677,544 169,386 42,346.5
116 Zamorakian IV 2 5 182,000 −3,059,222 −396,672 −99,168 −19,833.6
117 Saradominist IV 3 7 216,167 −4,379,990 −1,717,440 −429,360 −61,337.14
119 Green Gobbo Goodies III 4 6 186,333 −5,468,886 −2,806,336 −701,584 −116,930.67
119 Red Rum Relics III 2 4 160,000 −5,177,750 −2,515,200 −628,800 −157,200 Chance to obtain Spear of Annihilation tip at Warforge - Bandos's sanctum excavation site

Update history[edit | edit source]

This information has been compiled as part of the update history project. Some updates may not be included—see here for how to help out!