Just a start to list the new lapis types. Feel free to post updates or discussion about use and value.

Linking Chance
All Duals lapis have the same Linking Chance like ordinary level 4 lapises: 16% at full bless. They do not supposed to break gear in case of failure (at least with the same low chance like level 4 lapises)

Drop location
Duals drop in the new maps dino and desert 1, not two (two drops the almost useless accessory lapis).
The Dinos/Crocos & the giant turtles in jungle drop
* Craft, Mystic, and Wise.

The Spiders/Scorpions/Tiamatt temple mobs in desert1 drop
* Safe, Shrewd, and Fortune.

linking to
They usually go with any gear or weapon, except Dual Safe2 and Dual Fortune2 which go with weapon only while increasing attack as second stat.
And YES, it is possible to link all Dual Lapis of the same main stat into one gear. (F.e. dread gloves with Dual Shrewd 1 +2+3+4)

Lapis listing & description

This image has been resized. Click to view the full Size Image. Dual Safe , REC+9, +
~ Lapis1 -> phys. defence +12
~ Lapis2 -> max. attack +11
~ Lapis3 -> mag. resistance +36
~ Lapis4 -> SP+175

This image has been resized. Click to view the full Size Image. Dual Craft , STR+9, +
~ Lapis1 -> DEX+8
~ Lapis2 -> phys. defense +12
~ Lapis3 -> HP+175
~ Lapis4 -> SP+175

This image has been resized. Click to view the full Size Image. Dual Fortune , LUC+9, +
~ Lapis1 -> STR+8
~ Lapis2 -> attack+11 (min+max attack!)
~ Lapis3 -> SP+175
~ Lapis4 -> mag. resistance +36

This image has been resized. Click to view the full Size Image. Dual Wise , WIS+9, +
~ Lapis1 -> HP+175
~ Lapis2 -> MP+195(?)
~ Lapis3 -> phys. defense +12
~ Lapis4 -> mag. resistance +36

This image has been resized. Click to view the full Size Image. Dual Mystic , INT+9, +
~ Lapis1 -> WIS+8
~ Lapis2 -> HP+175 (?)
~ Lapis3 -> REC+8
~ Lapis4 -> MP+195

This image has been resized. Click to view the full Size Image. Dual Shrewd , DEX+9, +
~ Lapis1 -> phys. defense +12
~ Lapis2 -> LUC+8
~ Lapis3 -> SP+175
~ Lapis4 -> HP+175

(?) needs still confirmation since never seen in game