Area Room Category Name Description Difficulty Video
Norfair Lava Dive Room All Lava Dive with Hi-Jump Boots Show Intermediate Video
Align Samus with the edge of the horizontal platform above the door and run towards the open door. After taking approximately two steps forward, jump and hold jump. After the transition, hold down. With proper timing, you should have entered the lava pool without losing any momentum. From there, morph and hold left during the dive until you reach the far left Namihe. Jump on top of the Namihe, making sure to avoid any fireballs in the way. Walljump off of the Namihe above and let your momentum carry you to the right wall below the final Namihe. Walljump in place until an opportune time (when there isn't a fireball in the way) to walljump off of the final Namihe. Alternatively, you can skip walljumping off the final Namihe if you are comfortable doing so. Use your momentum to hit the final walljump off of the side of the top left platform near Ridley's maw.
Norfair Lava Dive Room All Lava Dive with Gravity Suit Show Beginner Video
The trick, known as Gravity Jump, allows the player to enter Lower Norfair without Space Jump. One thing to keep in mind is to press start and move while the screen is fading to black. The later you jump, the more height you will cover. The video showcases the trick with and without Hi-Jump Boots.
Norfair Lava Dive Room Any% GT Code Lava Dive Show Intermediate Video
As normal, it takes a good bit of practice to get good at these, so just keep trying.

Timestamps:
00:26 - Bounceball Entrance
2:28 - Hjless Gravityless
9:25 - With Hj no Gravity
12:15 - Gravity Jump w/ Hj
14:55 - Gravity Jump w/o Hj
Norfair Lava Dive Room GT Classic In-depth HJ-less lava dive tutorial Show Advanced Video
Also used in Any% GT Code and possibly randos.

Builds on matrick's lava dive tutorial by focusing on lava dive WITHOUT high jump boots. Also covers DBJ in Cathedral Entrance and minor deviations with GGG.

Norfair Lava Dive Room All Bootless Lava Dive Show Advanced Video
By taking damage from one of the Namihe shots while standing on top of another Namihe it's possible to gain enough i-frames to do a series of walljumps on the spikes to get across to the right side and then up.