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Back Creek, Rimu, Hokitika, Westland District, West Coast Region, New Zealandi
Regional Level Types
Back CreekCreek
Rimu- not defined -
Hokitika- not defined -
Westland DistrictDistrict
West Coast RegionRegion
New ZealandCountry

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Latitude & Longitude (WGS84):
42° 46' 16'' South , 171° 0' 18'' East
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Hokitika3,401 (2018)6.8km
Greymouth9,419 (2011)37.4km
Dobson738 (2011)43.1km
Harihari345 (2011)56.1km
Blackball321 (2011)56.2km
Mindat Locality ID:
7625
Long-form identifier:
mindat:1:2:7625:1
GUID (UUID V4):
ed42f721-644d-4e2c-bcd0-a4771ca068aa


Locality for the ornamental stone Goodletite (Ruby rock).

Goodletite is a generic term for a local rock, consisting of ruby, sapphire and tourmaline crystals in emerald green fuchsite, with margarite, and chromite. Like nephrite in the area, it is found as loose boulder float, but far rarer, and correspondingly expensive. No 'mother lode' source has yet been discovered. The rock is named after William Goodlet, who recognised it as an unusual stone when visiting the Rimu gold workings in 1892.

Goodletite has also been found at Kaniere, the Mont D'Or Mine at Ross, Olderog Creek, Whitcombe Valley, and the Taipo River.

The boulders contain ruby-sapphire corundum, chromian muscovite, margarite, tourmaline, chromian chlorite, Zn-Mn chromite, Mn-Ti magnetite, with rare serpentinite rinds. Some of the larger boulders show zoning, from a red-blue corundum-dark green margarite core to an intermediate zone of emerald green Cr muscovite, to an outer zone of grey green Cr chlorite in contact with serpentinite.

Colours range from colourless to deep ruby red-carmine, to pale blue to dark blue and violet. The micas have a significant paragonite component. The tourmaline occurs as veins, vein outgrowths and large poikilitic crystals replacing the mica matrix.

Corundum occurs as dark red-blue aggregates of anhedral-euhedral crystals set in emerald green micaeous matrix, often containing olive-green tourmaline veins, or black tourmaline crystals.


Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


1 valid mineral.

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Gold1.AA.05Au
Unclassified
'Goodletite'-

List of minerals for each chemical element

AuGold
Au GoldAu

Other Regions, Features and Areas containing this locality

Australian PlateTectonic Plate
New Zealand

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

 
Mineral and/or Locality  
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