SUPPORT US. Covid-19 has significantly affected our fundraising. Please help!
主页关于 MindatMindat手册Mindat的历史版权Who We Are联系我们于 Mindat.org刊登广告
捐赠给 MindatCorporate Sponsorship赞助板页已赞助的板页在 Mindat刊登 广告的广告商于 Mindat.org刊登广告
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe Elements书籍及杂志
搜索矿物的性质搜索矿物的化学Advanced Locality Search随意显示任何一 种矿物Random Locality使用minID搜索邻近产地Search Articles搜索词汇表更多搜索选项
Mindat手册添加新照片Rate Photos产区编辑报告Coordinate Completion Report添加词汇表项目
Mining Companies统计会员列表Mineral Museums矿物展及活动The Mindat目录表设备设置
照片搜索Photo Galleries今天最新的照片昨天最新的照片用户照片相集过去每日精选照片相集Mineral Photography

Mont Lyall Agate Mine, La Haute-Gaspésie RCM, Gaspésie-Îles-de-la-Madeleine, Québec, Canadai
Regional Level Types
Mont Lyall Agate MineMine
La Haute-Gaspésie RCMRegional County Municipality
Gaspésie-Îles-de-la-Madeleine- not defined -

This page is currently not sponsored. Click here to sponsor this page.
Latitude & Longitude (WGS84):
48° 48' 14'' North , 66° 5' 13'' West
Latitude & Longitude (decimal):
Locality type:
Köppen climate type:
Nearest Settlements:
Sainte-Anne-des-Monts5,602 (2016)46.3km
Name(s) in local language(s):
Mine d'agates du Mont Lyall

The Mont Lyall Agate Mine is a dig-for-fee site, in the Chic-Choc Mountains, in central Gaspe Peninsula, in the Quebec Appalachians. Agate thundereggs and geodes lined with smoky quartz, clear quartz or amethyst crystals are found in rhyolitic flows that have been altered to green clay. Some geodes contain botryoidal chalcedony (blue chalcedony, carnelian, etc...), sometimes coated with druzy quartz. Mt Lyall is an ancient volcano, formed in the Devonian epoch. It is part of an igneous complex know as "Dôme de Lemieux". Felsic porphyry is found at the top of the mountain, basalt in the middle part, and red porphyric rhyolite at the base.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

2 valid minerals.

Detailed Mineral List:

Formula: CaCO3
Reference: Frédéric Messier Leroux (2005 Field Observations)
Formula: SiO2
Reference: Frédéric Messier Leroux (2005 Field Observations)
Quartz var: Agate
Reference: Frédéric Messier Leroux (2005 Field Observations)
Quartz var: Amethyst
Formula: SiO2
Reference: Frédéric Messier Leroux (2005 Field Observations)
Quartz var: Carnelian
Reference: Frédéric Messier Leroux (2005 Field Observations)
Quartz var: Chalcedony
Formula: SiO2
Reference: Frédéric Messier Leroux (2005 Field Observations)
Quartz var: Jasper
Reference: Frédéric Messier Leroux (2005 Field Observations)
Quartz var: Smoky Quartz
Formula: SiO2
Reference: Frédéric Messier Leroux (2005 Field Observations)

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
var: Agate4.DA.05SiO2
var: Amethyst4.DA.05SiO2
var: Carnelian4.DA.05SiO2
var: Chalcedony4.DA.05SiO2
var: Jasper4.DA.05SiO2
var: Smoky Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates

List of minerals arranged by Dana 8th Edition classification

Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Unclassified Minerals, Mixtures, etc.
var: Agate-SiO2
var: Amethyst-SiO2
var: Carnelian-SiO2
var: Chalcedony-SiO2
var: Jasper-SiO2
var: Smoky Quartz-SiO2

List of minerals for each chemical element

C CalciteCaCO3
O Quartz (var: Chalcedony)SiO2
O Quartz (var: Amethyst)SiO2
O QuartzSiO2
O Quartz (var: Smoky Quartz)SiO2
O CalciteCaCO3
Si Quartz (var: Chalcedony)SiO2
Si Quartz (var: Amethyst)SiO2
Si QuartzSiO2
Si Quartz (var: Smoky Quartz)SiO2
Ca CalciteCaCO3


Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
MRNF - Rapport sur les activités d'exploration minière au Québec

Other Regions, Features and Areas containg this locality

North America PlateTectonic Plate

This page contains all mineral locality references listed on 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 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.
矿物 and/or 产地  
版权所有© mindat.org1993年至2020年,除了规定的地方。 Mindat.org全赖于全球数千个以上成员和支持者们的参与。
隐私政策 - 条款和条款细则 - 联络我们 Current server date and time: 2020.8.4 12:05:37 Page generated: 2019.10.3 08:35:56
Go to top of page